Hi @EricJames
thank you for the detailed feedback. I did try Scaler 2.5 in the latest Monterey (12.4) but I do not experience those crashes.
I used an M1 MacBook air to run my tests and I did not experience the slow UI you are reporting. Have you tried disabling OpenGL rendering from ScalerSettings? (Black screen - #3 by Frederic)
We will make the next version (2.6) available as a public beta so we can progress faster on those issues with the community feedback.
It will contain improvements to the UI performance on top of other bug fixes, so things should get better really soon.
I will be posting the link to the forum once the beta is available.
Cheers,
Ed