I own this copy and I don't know how to get the preferences file back. It's not in recycling bin, I accidentally deleted a whole lot of files.
When I try to open PS it says "Could not load actions because an unexpected end-of-file was encountered". Then I click OK and it says "could not initialize Photoshop beause the preferences file was invalid (it has been deleted)".
Very stressed out, please help! I don't know that much about computers...
If not, I would suggest getting a hold of Adobe Support and having them walk you through the process. Since you have purchased the software, they would have access to your Serial number and would be able to help you reinstall the program.