Jump Desktop with Thinprint RDP Client for MAC on MacOS Big Sur Issues?

I've been testing out Jump Desktop on Big Sur now that my customers are one by one upgrading. They have really depended on the Thinprint plugin.

Either way, on MacOS Catalina, plugin was working fine, then I upgraded my test mac to Big Sur, Jump Desktop to 8.7.14 and installed Thinprint Client for MAC RDP - beta v7.5.91. 
Regular printer redirection works, but set to use Thinprint, no printers get connected.

Even tried older version of Jump Desktop, no dice.

Anyone else using simular setup?