Remove following files from ~/Library/Preferences and make a restart:
Normally it is just one of these files, but I have had not the time to test it with four restarts.
Hi Melissa! A step by step instruction:
I suppose you are not sure about Terminal. (Would be easier to explain).
1. Go into the Finder (click the desktop).
2. Click on top on the "Go" Menu and click the ALT key. Go into Library
3. Then from Library to Preferences
4. Search in this Folder for "Preview". If there are too many files, you have searched "This Mac". So click on the "Preferences" on top of the window frame, too search this folder only.
5. Remove the items:
6. Restart your computer