Photolemur no longer supported?

I used Photolemur on Mac Catalina via Setapp. Worked well until recently. Now I can't add any additional filters, the app is taking me to subscription page for Skylum :( Setapp team has no idea why the app is no longer fully supported by them. Nothing else on the internet explains what happened here. Hope that maybe someone in Apple community knows what happened.

Please advise good alternatives. Will even look at Python editing libraries and machine learning. :) Thanks in advance.