There seems to be an uptick in Political comments in recent months. Those of us who are long time members of the site know that Political and Religious content has been banned for years. Nothing has changed. Please leave all political and religious comments out of the forums.
If you recently joined the forums you were not presented with this restriction in the terms of service. This was due to a conversion error when we went from vBulletin to Xenforo. We have updated our terms of service to reflect these corrections.
Please note any post refering to a politician will be considered political even if it is intended to be humor. Our experience is these topics have a way of dividing the forums and causing deep resentment among members. It is a poison to the community. We appreciate compliance with the rules.
The Staff of SOH
You can work around this issue by performing a "Reload User Aircraft" once after loading the aircraft in question. This will "unlock" all of the .xml file protections so that you can now load/edit/save .xml files...I know if one tries to open an .xml file that is part of the plane you are currently flying & try to save it will tell you you cannot, because it is using it.
Seeing as you've installed FSX to the default location in Program Files its almost definitely UAC sticking its nose in where its not wanted.
A bit late now unless you fancy re-installing from scratch but the best way to avoid this is to not install FSX in the default location.
Another drive is best but anywhere outside the Program Files folder will do such as C:\FSX or whatever.