This is driving me nuts! I set the perfect resolution on ScummVM in retroarch, save it as core override but next time I load it up the resolution has been over written and I'm not sure where the source of the over writing resolution is to disable it! Please help

I've successfully connected my bluetooth mouse to mi pi4 Recalbox but it doesn't work on any emulators or ScummVM. If I plug a USB mouse in the USB mouse works. Is there anything I need to set up to get it working? Thanks