How do I go back to my original version?

I purchased the entire Topaz package back in November 2022 and got Denoise, Gigapixel, Sharpen and Photo AI in the bundle…what a great interface. The year of upgrades were appreciated. The tool/interface was working fine but after my free upgrades ended I kept getting emails about an even better tool…I just upgraded my Photo AI to version 3…
COMPLETELY DISAPPOINTED with the user interface…what a horrible tool interface.
I WANT MY OLD VERSION BACK…How do I unload this and return to my previous version of Photo AI???
HELP.