The list ( https://portableapps.com/node/28593 ) is impressive.
"BAT file on start and exit for advanced users with platform env vars available"
Could I suggest to not restrict to BAT only?
It would be great to specify the full command (relative path to command and relative paths as arguments)
cmd /k something.bat
"..\TccLe\App\tcc.exe" /D /@"..\TccLe\data\tcc.ini" /C "..\TccLe\data\PortableStart.btm"
It would be great I have some ideas how it would be helpful.