Hi !As an administrator or an other user I have the same problem:My changes in PMDG option are not saved !On fsx menu I use AddON => PMDG => option I change an option (example simulation option) I press OKI come back on fsx menu I use AddON => PMDG => option and the change I have made are not here ! Windows 7 64 bitsWhere are saved the changes ? Witch file ?Any pb of write permission ?All PMDG directory have olready write permission.Thank for your helpChristophe Trichard