What Videopad version is being used? Here's the latest. For licensed users upgrades are free for up to six months from purchase date. After that, VP will continue to fully function but a fee will be required in order to register the newest. Retain your old install file and registration info.
Someone here will be glad to analyse your project if you share it - either here or privately. It's easy, takes little time and is the best way to track down issues. Follow the PORTABLE project steps, then submit the folder that is created (not the exported file) as instructed.
Here's how... http://nch.invisionzone.com/topic/23659-tips-for-getting-help-on-this-forum/
If it contains sensitive material link it in a personal message (PM). Click the envelope above. It won't be passed on or retained. Use FILE|SAVE PORTABLE PROJECT AS, not simply SAVE PROJECT. On the server, don't forget to copy a shared (public) link to paste into your post or PM.