Unfortunately, I don't know much about VPNs at all. But I don't think it's my job to look for updates, changes or solutions to an expensive, purchased program either. Nothing was changed on my computer and yet the problem suddenly appeared. Everything else works. All other programs can be updated. It's only DVDFab that causes problems. As I said, I haven't changed anything. What also helps is to download the new version and install it over it. But that's not a long-term solution either, especially since the program comes with an update function that doesn't work. And I'm not the only one with this problem.
Komet
might want to check your firewall & antivirus software, perhaps one those programs are blocking dvdfab from auto updating.
also, try going into common settings - click the factory default settings button in the lower left corner of the common settings
area, click ok and restart dvdfab and see if the auto update now works.