Question

Um i have a arma 3 injector and in the script for it i have execvm "mah.sqf"; but i dont know if i should do execvm "C:\Program Files (x86)\Steam\SteamApps\common\Arma 3\mah.sqf"; ? what should i do?

mah.sqf is from a very old and heavily detected menu. Unless you have already tried it and confirmed it as working then i would assume the injector could be the same.

as for your question, execVM "mah.sqf" is fine so long as that script and any other scripts are in your Arma 3 folder that you linked above. Arma will fill in the full address for ya.