I've already added my profile to the list, and I've tried launching it as administrator without any success. i.imgur. com/n0k8Viy.png
Also when I use the LPManager while it being in the ARMA3 root folder, nothing happens when I hit "Privilege".
EDIT: Ok, I got it working. The solution was to launch steam as a administrator. I think it is because if you launch the arma3.exe from the folder it doesn't include the malloc=tbbmalloc parameter, and if you launch it through steam it doesn't launch as administrator unless steam is launched as administrator, if you get me.