Yes, I did experience a problem after updating.i too got a window with a yellow exclamation ⚠️ that informed me that my vram was only 8gb and using metal 2 that was not meeting the minimum requirement.
After updating and opening the program the basic tone and color worked fine, but clicking on local and choosing anything other than brush it would continuously scan with no end.
On1 does have excellent customer support. They suggested that I either go back to the previous version or upgrade my system.
I’m currently running a late 2017 iMac i7 with a Radeon 580 pro 8gb video card that uses metal 2. The metal 2 is what does not meet the minimum requirement. There’s no way to upgrade my system so I went back to the previous version.