I tried the newest version of FocusMax recently, it was 3.6.something (can't verify now, obs PC is dead). For some reason it wouldn't work properly with my RoboFocus. I thought the focuser was moving but it wasn't. It was connecting via ASCOM rather than using the RoboFocus program. Perhaps I needed to install something new for the RoboFocus (it's been installed for some years as-is) although I am sure I did have focus driver installed for ASCOM, but I quickly reverted to the earlier version of FocusMax as it wasn't worth messing up the setup. I do have ASCOM6.