Hi Davide,
I have installed the beta installer directly on the already installed version of Scaler 3 and I have made some tests like opening and closing sessions, it’s seems to work very fine, I had no crashes during my tests. I only had one crash because I opened a project with Scaler 3 Detector in it. So you will have to patch the same way Scaler 3 Detector.
Good Jobs guys, I think you’ve found the problem 
I will continue to test it and I will come back to you if I notice anything wrong.
Thanks to you and to the dev team.
Philippe.