Hi André
On the CS3 you need to clean all keybord entries that were created by the CS3 command "Look for new MFX devices", select each one and delete each one.
You may have to do some cleaning on the layout (Gleisbilder) side.
You must install again each entry of the m83 in conjunction with the switch settings

By now, the 60832 (m83) should respond to the MM2 or DCC commands as there is no RESET command available on the m83

Sure there are other ways to do things but the fact the m83s are screwed under the layout and harwired does not make it convenient for registrations (sometimes by accidents)
Cheers
Jean

Thanks a lot ! but I am using a CS2, not a CS3.
Your tips were applied but impossible to get a clean keyboard.
Now I am going to apply a factory reset of all data as soon as I find the original TGZ files ...
BR,
-@ndré

Yes John I know all the files that can be found on my old CS2, no such file exists there except index.sh and my own backups.
I unpacked all files I could download from Märklin, all update files, I even unpacked the BTRS update file for the CS3 but no such file found nowhere.

The reason is of course that someone cleaned up the backup folder, maybe it's me, I don't even remember (Alzheimer ?), but as I am used to clear unnecessary things it is possible, sorry ! :(
FYI : whenever all records have been removed from the keyboard, one by one clicking on the trash icon, I start a new MFX discovery - which is working properly - but it is never starting from the top, record number 1 !
This is the reason why I need to recover the Reset*.tgz files.

Thanks anyway !

-@ndré

PS : same topic also posted on 3Rails.