I apologize for the confusion. It seems we need to get back to the previous channel layout. Here is the 3.0.68 which should work for you.
https://jamorigin.nyc3.cdn.digitaloceanspaces.com/midiguitar3/MIDIGuitar3.0.68.exe
Please see Just bought Midi Guitar 3 Hex after demo worked perfectly - and now it's broken. Help! - #3 by JamO