realstar wrote:
Seems a bad config file got put in the last release as I was testing some things. For a quick fix copy this into 'GenesisPlus/prefs/'

https://realstar.neocities.org/inputp1.config

There is a duplicate value in the input config that is mapped as the key down release causing things to stick. Will fix for next release. Can also check on disable borders for GameGear/SMS.