just tried a fresh download / install of Recalbox, transferred & checked all required BIOS / Kickstart Roms, kick13,kick20 & kick31, all MD5 checked in Recalbox Manager, transfered another couple of WHDL Games and associated UAE files to Roms / Amiga Folder, refreshed gameslist, run a game and black screen again.
One thing I did find out that its not actually a crash as I first thought, using recalbox manager on my laptop I can Restart ES.
So I`m stumped!