If you are good arround your PC files there is way to fix that:
go to: c:\Users\YOURUSERNAME\AppData\Roaming\Affinity\Photo\2.0\Plugins\
and rename TopazPhotoAI.8bf to something other
then go to: c:\Program Files\Topaz Labs LLC\Topaz Photo AI\
and copy TopazPhotoAI.8bf to a previous location where you renamed old one
it works here
