Hello
this seem to be an old post, but i have that same issue.
I did remove arma3, no fix, i removed steam, no fix.
i deleted the appdata local file .... no fix
then, each time i have to go with arma3.exe, but then BE is not loading .... and it's not fun
please help me
thanks
launcher is showing lunching game beside arma3 name, then Synchronisation and then nothing :(