Topaz AI suddenly quite working

Not sure what is going on here, but for some reason, Topaz AI just quit. I was using it earlier today without any problems but now, when I try to send a Canon CR3 file to it for editing, the page shows up a dark gray, I had edited the photo so I attempted to send an unedited one but the results were the same. I then attempted to drag and drop an image which did show up but all the controls were grayed out.
I am using a 24" iMac with the M1 chip and running it on Ventura 13.4.1. Topaz AI is v. 1.5.1 and LrC is v. 12.4. It was working fine earlier as I said. I have rebooted everything but nothing is working.
My apologies, I should have look more thoroughly for a solution. Earlier suggestion to delete plist files worked. Thanks and sorry for not checking a bit more thoroughly.

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