I'm not talking about installing the software using the Run as administrator. I'm talking about running the Weapon for FSX "Loader" using the "Run as administrator". I don't always have to use it either, but sometimes the Loader fails to make the changes required to add the weapons to an aircraft, using "Run as administrator" prevents that from ever happening. I'd rather just do that, than add to an aircraft, start FSX and then find that it isn't working on the aircraft I just added it to.

Out of curiosity, what setting is your UAC set to? Mine is set to the default setting, which is 2nd from the top.