Routine saving just protects from project loss. It doesn't affect export.
If you have reinstalled the latest with no success, it is possible that the component files are messed up.
Please try this:
Close VideoPad.
Delete everything in components folder using windows explorer: C:\Program Files (x86)\NCH Software\Components (or similar, without the x86)
Also delete all files in this folder... C:\Users\[user name]\AppData\Roaming\NCH Software\Components
Reinstall VideoPad and re-register if necessary.
You'll need internet access during the reinstall. The components will be automatically downloaded when you export again.