@Turrican2k I had the same problem, played with all settings but none of them did the trick. Only downgrading to 3.3 worked for me.
ssh to the system then

wget https://github.com/BlitterStudio/amiberry/releases/download/v3.3/amiberry-v3.3-rpi3-dmx-32bit.zip unzip amiberry-v3.3-rpi3-dmx-32bit.zip cp amiberry /opt/retropie/emulators/amiberry/ cp capsimg.so /opt/retropie/emulators/amiberry/

I have the same question as this so bumping this old thread - I can't seem to find a way to remap. Does anybody have an idea please?

@axelbrook Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

@George-Spiggott Ok, I will try them out with other settings and see how it goes. One thought I have is that they actually are .lha format and maybe the files then are assumed to be WHDload when run and then it fails to load since they are not... Did that make any sense? :)

I haven't tried ISO yet but will give that a go if I can't get the .lha files to work.

@mitu

ok. maybe there's a good samaritan among the "normal" users from the comunity who can help...