I'd been putting off updating Topaz Studio 2 with the latest PS and LR until today and the installer got as far as uninstalling the old version and then didn't like something about the new version and quit. Going back to the Topaz web-site and downloading the installer from there worked fine so I'm now back up and running - I suspect by delaying I had finished up with an out of date installer. So far all is working fine ..
Fujifilm XT-3 mirrorless Nikon D7000 Photoshop Elements many versions Photoshop CC, Lightroom Classic, ON1 Raw
tonyw , I also had problems updating Topaz Studio 2. Some of the panels were blank in the standalone version; the plug-in would freeze. I downloaded the latest installer from their website and now everything is working just fine.
Photoshop Elements 7,10,11,12,13,14,15,2018,2019,2020 Photoshop 2020 & Lightroom Classic 9 Windows 10 Pro