Aperture resetting preferences on launch

Question

My Aperture preferences are constantly being reset when launching Aperture. For example, the following preferences:
View > Inspector > Swap Position
Preferences > General > Automatically stack new versions
View > Hide Toolbar
Aperture > Commands > Custom Command Set
Preferences > Export > External Editor > CS6
Preferences > Export > External Editor File Format > TIFF16BIT
And more. Whenever I launch Aperture I must reset every one of these, every time : (   Any ideas?
Graham
grahamclarkphoto.com

Answer 1

Graham,
this looks, like Aperture is unable to write the preferences file or your presets.
See the Aperture 3: Troubleshooting Basics on how to remove the com.apple.aperture.plist file from the Preferences folder and how to remove the command presets.
You did not say, what your Aperture version and your MacOS X version are. In MacOS X 10.7.x  your user library is hidden.  You open it best from the Finder's "Go" menu, from the main menu bar:
     Go  > Go to folder           then hold down the alt/option key until the library appears in the drop down menu. Select it to open.
Also, with the new process model in Lion and Mt. Lion I'd log off and on again, before removing preferences files. Quitting an application alone will not always suffice to terminate the processes.
Regards
Léonie