It seems Topaz Video Enhance AI has been on a weekly update schedule for a while now. So I don’t think they released the update because they really wanted to get these changes out, but instead they wanted to stick to a weekly update schedule and this was all they had ready for a stable release.
I dunno what to say, but even in this version the preview and preview slider get stuck shortly after the beginning of the processing until the processing finishes.
Can confirm, on Windows 10 Pro. This release broke my install. I managed one task, and then it stopped working. Restarting the computer gave the same result. Reinstall with the previous version did not fix this.
Uninstalling this version and reinstalling the previous made things work again.
Oftentimes it is easiest to share a screen recording for issues like this to quickly show me exactly what is happening. I use Loom for screen recordings since this is a free and easy to use app.