On startup Calendar shows only one calendar The following problem has appeared a few days ago. I believe I have not changed any settings.

Whenever I open up Calendar under OS 10.8.2 on my MacBook Air it shows just one of the calendars I sync with Google. This one has a tick mark in the calendars list shown under the menu "Window":



When I click on "Window > Calendars" (or "Cmd-0"), all calendars appear:



But when I shut down and open Calendar, only the one calendar shows up again.

I don't know where I can set this to always display all calendars, as it was until a few days ago. None of the calendars are ticked under "Preferences > Account > Delegation", and ticking them changes nothing:



I'm on a German system, so menu items are maybe named differently in English than I translated them. I added some images to make my meaning more clear.
Close Calendar app. Go to Finder. Press cmd+G to navigate to a folder. Type in ~/Library/Preferences. Locate a file called com.apple.iCal.plist. Move it to Trash.

Now try to relaunch Calendar. Hopefully you should now be able to select the calendars you want to see and have them still be selected once you quit and reopen Calendar.