How can I force it to open the link in the existing window?
Image-specific settings (such as linkTarget) are not stored in preset XML files and it is currently not possible to set the linkTarget entries within the Showkase interface. (This functionality will be introduced in the next version of Showkase although I do not know when it will be released.)
Currently, the linkTarget entries in your gallery's XML file are empty so Juicebox-Pro uses the default value of '_blank'.
You could open the gallery's XML file ('djphoto.com/work1/corporate-events/config.xml') in a plain text editor and change all the linkTarget="" entries to linkTarget="_self".
Is there a way to keep the Title that appears at the lower portion of the picture visible even when the cursor moves away from the large image and thumbnails?
Currently, your caption is positioned on the image overlay (captionPosition="OVERLAY_IMAGE").
You can have the image overlay displayed at all times by setting showImageOverlay="ALWAYS" (in JuiceboxBuilder-Pro's 'Customize -> Main Image' section).
Otherwise, you could reposition the caption to somewhere other than the overlay, e.g. captionPosition="BELOW_IMAGE" (in JuiceboxBuilder-Pro's 'Customize -> Caption' section).