Uninstalled everything

I have uninstalled every Topaz application from my iMac. Which versions have the best chance of restoring prior ease of use and functionality? I am starting with Photo AI 2.3.x.

Which version was the last one that made you happy? That would be the best place to start.

Thank you, but that question is for Topaz. I was dialoging with them via email today and they were going to help me sort out the best options for a laptop I use.