Scaler2 install problem from 2.7.1 to 2.7.2

I’ve updated Scaler 2 from version 2.7.1 to version 2.7.2 and now the program will not run and no longer appears in Studio One’s list of plug-ins (checked the blacklist and it’s empty). It also won’t run in Plugin Guru’s Unify either and it did. It’s appeared to complete installation as normal. I use custom installations as I have done for all previous versions without any problems. Has the installer been changed to ignore user’s custom directories?