I'm running on an old laptop with Windows XP home. I don't see an "admin" option. It just shows compressed item properties. Doubled clicked Macroquest 2, hit Extract All, then Next, then Next again, and it says "File Release is password protected. Please enter the password in the box below".
It also gives me the option to skip that file, but isn't that one I need? Sorry I'm a little ditzy I just extracted it all before and it worked like magic.