First you should enable showing the hidden files by going to the control panel:
1. press the Windows Logo Key+R and the type in control panel and press OK
2. Click on Appearance and Personalization
Then under Folder Options click on Show hidden files and folders
Then go back to
and dete the following two files
Then start or restart the pse 9 editor and wait for the data base to rebuild.
It can take awhile, so just let it run.