Should I get a new copy of the BIOS?
it says you don't need any special BIOS-File to play Apple 2 Games on Recalbox
So why did you want to get a "new Copy of the BIOS" ?
You can check if you need a BIOS and if you got the right one (not only by Name but by MD5-Checksum too) in the Recalboy Main Menu.
Did your Games have the rigth Extension and did you put them in the right Folders (see Links above) ?
Thank you @alvin. I did see they said a BIOS isn't required, but I'm getting a screenful of checkerboard and @ signs and the PC freezes. Even the games that come by default give the same result. I managed the get the 2GS to play the games, but not linapple. I've attached a screenshot in case it might help.20220422_140646 (1).jpg
Look here at the last Picture on the LinApple Homepage
Looks almost the same like your Screenshot but on the whole Page it's never been explained why this happend.