[fly_zo]

its not STD folder ( or files in it ) which cause 60% CTD ...... its relation between air.ini file ( STD folder ... list of planes game is loading) and buttons file ( coming with AC Installer ) which contains all data for any plane .

If your air.ini doesn't match buttons file data = 60% CTD

So if you want beta mods with new flight models ( buttons file) please wait for their "data" to get incorporated in next version of AC Installer.

using nonofficial buttons file isn't good idea ...

regards
Z