The problem is due to the program not being able to write the registration information to the regkey.xml file. During installation the regkey.xml file should be installed with Modify privileges given to the standard user but sometimes this doesn't appear to 'stick'.
Version 8
The FLProShellAdmin.exe
application, located in the FileLocator Pro folder, adds Write permissions to this file for the Authenticated Users group every time it is run so simply double-clicking on this file should resolve the issue.
Other methods
If you were provided with a pre-filled regkey.xml file via email the simplest way to fix the problem is simply to copy that file from the email into the installation folder, over the top of the previous regkey.xml file. You can also download a pre-filled regkey.xml file from the MyAccount section of the web site.
If you don't have a pre-filled regkey.xml you can still fix the problem by manually changing the security permissions on the regkey.xml file:
- Right-click on the regkey.xml file and select Properties
- In the Security tab click the Edit button
- Give the Users group Modify permissions
- Click Apply and close the dialogs

Now when you enter the registration information it should be saved properly.