In answer to AlanShepp-Zim's query...
No, speeds are the same for the UN and licensed versions.
How long is the project? What is the resolution of the bulk of the source files? What's the export resolution and file type? How long is it taking?
What version of VP is being used? Install 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 will be glad to check out your project if you take a few minutes to share it. It's easy - just follow the PORTABLE project steps outlined here. Don't submit the exported project.
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.