Please try the following to uninstall Photo Editor 2008:
 
For Windows XP:
 
1.From Control panel | Add or Remove Programs, uninstall ACDsee Photo Editor 2008 
2.Delete "2008" folder in user profile's folder with the steps below 
 
- Go to the Start Menu and select Run 
- Type in %appdata% and Click OK 
- Double-click ACD Systems (folder) 
- Double-click ACDSeePhotoEditor (folder) 
- Delete 2008 (folder) 
 
3.Delete "C:\Program Files\ACD Systems\ACDSeePhotoEditor\2008" folder if that folder still exists 
4.Reinstall the program with your license code, or trial license code 
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For Windows Vista or Windows 7 
 
1. From Control Panel |Programs and Features, uninstall ACDsee Photo Editor 2008 
2. Delete "2008" folder in user profile's folder with the steps below 
 
- Go to the Start button, in the "Start Search" field, type Run 
- Type in %appdata% and Click OK 
- Double-click ACD Systems (folder) 
- Double-click ACDSeePhotoEditor (folder) 
- Delete 2008 (folder) 
 
3. Delete "C:\Program Files\ACD Systems\ACDSeePhotoEditor\2008" folder if that folder still exists 
4. Reinstall the program with your license code, or trial license code