Add an exception to the trainer and to '~Mnn133.tmp' file in your temp directory in windows defender. If windows ask how to open a temp file it might be because of missing administrator rights. Windows 10? right click on the trainer and select 'run as admin'.
Much appreciated! I have never seen a flag like that before, I have always used admin to open. The file being flagged was backdoor... after I allowed it the trainer opened just fine.
Thanks