Not sure why others are having trouble with this. It installed & activated without issue for me. On Windows 11 x64, and I still have their previous WinX HD Video Converter Deluxe giveaway installed alongside it; it didn’t cause any issues with installing this newer app. Thanks!
FYI you can’t update the app to the newer version, even though it’s dated for before this giveaway expires. The giveaway serial doesn’t work on that 2.1 version. It’s worth taking advantage of the $30 Lifetime deal they offer to upgrade, that’s actually a good deal.