1. Open the Applications folder.
2. Drag the Aperture application to the Trash.
3. Open the Utilities folder within the Applications folder.
4. Open the Terminal application.
5. On the command line, type the below command (which is case-sensitive) and then press Return:  (or copy and paste)
   sudo pkgutil --forget com.apple.pkg.Aperture
6. When prompted, enter your user password and press Return.
7. Insert your Aperture disc and install Aperture.

Then run the update installer package,

http://support.apple.com/kb/HT3805

Have yet to find a solution for Aperture crashing on opening…..have done everything possible.