Your screenshot looks very strange.
The drop-down menu at the top is missing, there should be a Juicebox logo to the left of 'Start -> Images -> Customize -> Publish' and there should be no "Upgrade to Juicebox-Pro!" link in JuiceboxBuilder-Pro.
It certainly seems that your JuiceboxBuilder-Pro installation is somehow corrupt and I'd recommend a complete uninstallation/reinstallation of both JuiceboxBuilder-Lite (if you have it installed) and JuiceboxBuilder-Pro.
Please follow the procedure below.
(1) Uninstall JuiceboxBuilder-Pro.
Mac: Delete the 'JuiceboxBuilder-Pro' file from the Applications folder and empty your Trash.
Windows: Use the uninstaller in the 'Control Panel -> Programs -> Uninstall a program...' list.
(2) After uninstalling JuiceboxBuilder-Pro, please check that there are no files are left behind (even from a failed installation) by manually deleting the following folders (if they exist) from your hard drive:
Mac:
/Applications/JuiceboxBuilder-Pro.app/
/Users/Username/Library/Application Support/Adobe/AIR/ELS/JuiceboxBuilder-Pro
/Users/Username/Library/Preferences/JuiceboxBuilder-Pro
Windows:
C:\Program Files (x86)\JuiceboxBuilder-Pro
C:\Users\Username\AppData\Roaming\Adobe\AIR\ELS\JuiceboxBuilder-Pro
C:\Users\Username\AppData\Roaming\JuiceboxBuilder-Pro
C:\Users\Username\Documents\JuiceboxBuilder-Pro
You may need to show hidden files to find some of the above locations in Windows File Explorer.
(3) Also, please follow the procedure above (Steps #1 - #2) for JuiceboxBuilder-Lite, too (if you have it installed).
JuiceboxBuilder-Lite and JuiceboxBuilder-Pro can both be installed and run side by side on the same computer but, being that you are experiencing problems, it might be wise to completely clear your system of all JuiceboxBuilder files before trying to reinstall JuiceboxBuilder-Pro.
(4) Reinstall JuiceboxBuilder-Pro following the instructions here.
(I realise that you are using a Windows PC but I've included notes for Mac above, too, in case any Mac users are experiencing similar issues and are reading this forum thread.)
Hopefully this will help.