Yes, the Juicebox Lightroom Plugin should install and run fine on Lightroom 4 or later.

The Juicebox Lightroom Plugin is not technically a Lightroom 'Plug-in' (and it cannot be installed by Lightroom's 'Plug-in Manager'). It is actually a Lightroom 'Web Engine' and, once installed, shows up as a 'Layout Style' option in the 'Web' module.
Installation instructions can be found on the support page but below are some additional details which should help you to successfully install the web engine.

You should be able to install the Juicebox Lightroom Plugin as follows:

(1) Extract the Juicebox-Pro v1.5.1 zip file and you'll find the Juicebox Lightroom Plugin in this location:
juicebox_pro_1.5.1/adobe-lightroom-plugin/juicebox_pro.lrwebengine

(2) On a Windows PC, juicebox_pro.lrwebengine looks like a regular folder but you should be able to install the web engine by dragging and dropping the juicebox_pro.lrwebengine folder directly onto your Lightroom desktop shortcut (and a small pop-up dialog box should ask you if you want to install it).
On a Mac, juicebox_pro.lrwebengine is seen as a special package and you should be able to install the web engine by double-clicking the juicebox_pro.lrwebengine package. (Please note that this double-click method does not work on a Windows PC.)

(3) If the auto-install methods from #2 above do not work, then you can install the web engine manually by copying and pasting the complete juicebox_pro.lrwebengine folder/package (not just its contents) into the following location:
Mac OS X - Users/Username/Library/Application Support/Adobe/Lightroom/Web Galleries/
Windows Vista, 7, 8, 8.1 & 10 - C:\Users\Username\AppData\Roaming\Adobe\Lightroom\Web Galleries\
On a Windows PC, you might need to show hidden files to navigate to this location in Windows File Explorer.

If you cannot find Lightroom's 'Web Galleries' folder on your computer, then please try the following:

• Open Lightroom.

• Go to 'Edit -> Preferences...' (from the drop-down menu at the top).

• Select the 'Presets' tab.

• Click the 'Show Lightroom Presets Folder...' button.

• Navigate inside the 'Lightroom' folder in the file explorer window that pops up.

• Now navigate inside the 'Web Galleries' folder. (If the 'Web Galleries' folder does not already exist inside the 'Lightroom' folder, then you'll need to create it manually.)

Now, paste the juicebox_pro.lrwebengine folder/package directly inside the 'Web Galleries' folder (overwriting any existing juicebox_pro.lrwebengine folder/package).

Before attempting the manual method, try deleting any existing juicebox_pro.lrwebengine folder/package from the 'Web Galleries' folder and re-try the auto-install method for your platform (Windows PC or Mac).

(I realise that you use a Windows PC but I've included some Mac details above, too, as it may help other users facing a similar problem.)

I hope this helps.

You're welcome!

You can point the Back Button towards any URL you like via the backButtonUrl configuration option (the URL does not even need to be within your site).
The path for the backButtonUrl can be relative (to the web page containing the gallery's embedding code) or absolute (in the form 'http://www.example.com/gallery/index.html')

The Back Button is the easiest way to include a link in a gallery (and the only dedicated feature available to do so).
You can, however, use the Gallery Title as a link and you can also include links in image titles and captions using HTML formatting as noted in these FAQs:
How do I add HTML formatting to image captions and titles?
How do I add HTML formatting to the Gallery Title or Back Button?

It sounds like you might want to have links alongside the gallery (pointing towards other pages within your site).
If so, then you might like to take a look at another of our products, Showkase, which allows you to create a complete portfolio website including Juicebox gallery pages and non-gallery pages (where you can add whatever content you like). Every Showkase site features an automatically-generated navigation menu (with links to all pages within the site).

Showkase is a PHP web application which in installed on your web server and whose interface is accessed via a web browser.
Showkase has full support for Juicebox-Pro and the galleries can be created within the application itself via its interface (or created with JuiceboxBuilder and imported).

You can create Gallery Index pages and have as many galleries listed on each Gallery Index page as you wish.
Each gallery is represented by a thumbnail image with the gallery title displayed below and the gallery is opened when the user clicks on the image.
Demo sites created with Showkase can be found here and a sample Gallery Index page can be found here.

Showkase can also create non-gallery pages (About, Basic and Contact pages) where you can add information about yourself (or any other content you like).
All of this is done automatically within the Showkase interface without the need for any manual coding at all.
You can take a look around the Showkase interface by logging into the Live Demo Admin.

Showkase can be purchased as Showkase-Standard (which comes with Juicebox-Lite) or Showkase-Pro (which comes with Juicebox-Pro).
The only difference between Showkase-Standard and Showkase-Pro is the bundled viewer (Juicebox-Lite vs Juicebox-Pro).

I hope you find this information useful.

The workaround should work fine. I tested it myself before posting it. Hopefully it will be a suitable solution for you.

That's strange. When creating an album with the Juicebox skin, there should be only one 'index.html' file (in the root output directory). The skin should not generate additional index pages (like 'index2.html', 'index3.html', etc.). Such files are usually generated by skins that do not display all images on a single page and split the images over a number of different pages. I'm wondering if maybe your additional index pages are remnants of having made an album with a different skin before switching to Juicebox (and are actually redundant and do not play a part in the Juicebox album). Otherwise, I'm really not sure what settings would cause the Juicebox skin to generate more than one index page.
In any case, it is the 'index.html' file in the root output directory that you should add the code to (or the skin's template 'index.htt' file if you want the code to automatically be included in all albums made by the skin).

You're welcome!
I hope you find it useful.

I'm happy to hear you've got it working!
Thank you for letting me know.

Judging by the vertical nature of the Button Bar, it looks like a dimensional/timing problem (maybe the tab's dimensions are not fully set up when the gallery is loaded).
Additionally, if I resize the browser window (forcing the gallery to be redrawn with new dimensions), the main image and the Button Bar are both displayed correctly.

Thinking about my original suggestion, it looks like adding code such as:

<script>
    loadGallery('aluminium/', 'juicebox-container-1');
</script>

.. in each tab will still load all galleries as soon as the web page is loaded (so galleries 2, 3 and 4 may still be loaded within hidden tabs). It looks like tabs 2, 3 and 4 may not be visible when the web page is initially loaded but all the HTML and JavaScript code within the tabs will be parsed by the browser on load.

However, loading only one 'juicebox.js file per page, embedding each gallery into a unique container and using a loadGallery() function are still steps in the right direction so all your work so far has not been in vain.

Here's perhaps a better suggestion which should hopefully work (and load each gallery on demand only after the parent tab is visible, i.e. when a tab is clicked).
Create a click handler for your tab headers and run the loadGallery() function to load the gallery corresponding to the selected tab.
Remove the individual calls to the loadGallery() function (but leave the gallery container divs in place) and add the following code just below the loadGallery() function itself.

$(document).ready(function() {
    $("li[role='presentation'] a").click(function() {
        var gallery = $(this).attr('aria-controls');
        var base = gallery + '/';
        var container = 'juicebox-' + gallery;
        loadGallery(base, container);
    });
});

(The code above extracts the gallery name from your conveniently named 'aria-contols' attribute and uses it to form the baseUrl and containerId.)
If this does not work, then you might need to introduce a slight delay before loading the gallery (to ensure that the tab's dimensions are set up) so try this (which has a delay of 200ms before loading the gallery).

$(document).ready(function() {
    $("li[role='presentation'] a").click(function() {
        window.setTimeout(function() {
            var gallery = $(this).attr('aria-controls');
            var base = gallery + '/';
            var container = 'juicebox-' + gallery;
            loadGallery(base, container);
        }, 200);
    });
});

I hope this helps to resolve your problem.

The SimpleViewer skin for jAlbum used a third-party audio player embedded in the main album page so the audio track did not change when new galleries were selected.
The Juicebox skin does not feature a third-party audio player and, as you have discovered, adding an audio track to each individual Juicebox gallery will result in the audio tracks overlapping each other when new galleries are selected.

Unfortunately, there is no Juicebox-Pro API method to specifically stop audio from playing. There is just a toggleAudio() method and no way to easily track the status of the audio (to determine whether it is playing or not). The only way I've found to stop audio from one gallery before loading another relies on the Button Bar being visible in the galleries (to check if the Audio Button has the '.jb-status-playing' class) and invloves iterating over all '.jb-bb-btn-audio' elements to stop those that are playing.

Try opening your album's 'index.html' file and the following code immediately after the function loadContent(galleryPath, galleryCount) { line:

if (jb) {
    $('.jb-bb-btn-audio').each(function() {
        if ($(this).hasClass('jb-status-playing')) {
            jb.toggleAudio();
        }
    });
}

(You can add this code to the skin's template 'index.htt' file if you like and the code will automatically be included in the album's 'index.html' file each time you edit or create a new project.)

I hope this helps.

You're welcome!
I'm glad you've now got a PHP script which works as you like.
I hope you have a great Christmas, too!

No problem.
Just create a new thread for each issue and I'll do my best to help you out.

If you still want to reverse the order of the images, replace:

$gallery=GetDirArray('images');

... with:

$gallery = GetDirArray('images');
$gallery = array_reverse($gallery);

Your PHP script does not populate the image titles or captions with anything at all. They are currently empty.
As an example, if you want to display the filename (without the file extension) as the image title and the IPTC Description (embedded within the image) as the image caption, then replace:

echo '<title></title>';
echo '<caption></caption>';

... with:

echo '<title><![CDATA[' . pathinfo($gallery[$i], PATHINFO_FILENAME) . ']]></title>'; // Extract and use filename without file extension for image title
$caption = '';
$size = getimagesize('images/' . $gallery[$i], $info); // Puts image info into $info array
if(isset($info['APP13'])) { // If IPTC data is present in image info...
    $iptc = iptcparse($info['APP13']); // Put IPTC data into $iptc array
    $caption = $iptc['2#120']; // Use IPTC Description as image caption
    $caption = preg_replace('/\r\n|\r|\n/', '<br />', $caption); // Ensure line feeds and carriage returns from IPTC Description are respected
    $caption = preg_replace('/\p{Cc}+/u', '', $caption); // Strip control characters from image caption
}
echo '<caption><![CDATA[' . $caption[0] . ']]></caption>'; // Display image caption

With your current gallery settings, you'll likely need to increase the maxCaptionHeight value (from 50 to something larger, such as the default value of 120) to accommodate both an image title and an image caption (for both to be visible).

I hope this helps.

Your album is certainly using Juicebox-Pro v1.5.1 and the galleries within the album are definitely using the Pro files.
Your second gallery ('Childrens Ward On The Asylum') displays 54 images (if the gallery was using Juicebox-Lite, only 50 images would be displayed) and thumbsPosition="LEFT" (a Pro only configuration option) is active.
The only problem I can see with this particular gallery is that the audioUrlMp3 has been set as: "gallerysoundtrack.mp3" . (with double-quotes, a tab character and a dot at the end).
Change "gallerysoundtrack.mp3" . to just gallerysoundtrack.mp3 and your audio track should play (as long as the file is in the correct location on your web server).

If you still see Juicebox-Lite galleries within your album (signified by the Juicebox logo in the lower right corner of the galleries), then the problem is more than likely to be a caching issue (either server caching or client-side browser caching).
Check with your web host to see if server caching is used on your web hosting account (and, if so, ask if it could be disabled, at least for testing purposes) and make sure that you clear the cache of any browser that might have been used to view your site whilst Juicebox-Lite files were in place.

Hopefully this will help.