When you see "download for free" it often means a trial version. NCH is more liberal in that regard than some other companies - 'free' trials can be used forever. You don't have to pay but there are limitations. Usually the AVI export format works. Try AVI as a VIDEO file, then instead of using Videopad's direct YouTube uploader, use the YT uploader to process that file. I f companies gave away their technology they wouldn't last long, and you would have no software to play with.😘
If AVI is locked out, try an install of this Videopad version. Be sure to SAVE PROJECT AS regularly, not just SAVE PROJECT, so old saves are not overwritten. You won't lose a thing.
VPJ is not a playable export format; it's the control file for Videopad. When a project is saved, it creates that file. Double-click the file in the future and the project will be reloaded - as long as the source files have not been moved or deleted.
Worse case scenario, if you cannot export your work, someone here will do it for you. Share the project, per these portable project instructions...
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, and don't forget to get a shareable link to post.