Uwe,
I'm not sure if this will work for you, but I had a similar issue recently with OSX 10.7.5 and contacted iPACS directly. I've noticed that RC7 sometimes gets downgraded to standard when adding too many additional scenes and models. I have since only loaded the extras that I use often and keep a complete backup of the basic Aerofly RC7 folder with a separate backup folder for additional scenes and models.
iPACS recommended to do the following:
Please perform the following steps:
- Completely remove aerofly RC7 from the Applications folder
- Completely remove the aerofly RC 7 user folder
- Redownload aerofly RC 7 again from App Store
- Run aerofly RC 7, make no modifications and do the upgrade by selecting "restore purchases" in the "in-app purchases" menu
Note: To delete your aerofly RC7 user folder
By default the Library folder of Max OS X is hidden. To open the Finder with a visible Library folder, press and hold the ALT Key, choose the "Go To" menu and then select "Library". A Finder window with the Library folder will then be opened. Next click yourself to the aerofly RC 7 user folder which is located here
~/Library/Containers/com.aerofly.aerofly-rc-7/Data/Library/Application Support/aerofly RC 7/