Just to clarify, the offending software was On One Perfect Photo Suite 9.5. I have no issues using the previous version Perfect Photo Suite 8 as this works fine now that 9.5 has been uninstalled. I'm glad for forums like this to discuss issues that come up. On One denies any culpability for this so it was left up to the user to figure it out. I have another system in my photo studio running LR 6 and On1 Perfect Photo Suite 9.5 on Windows 7 with no issues. It just seems to be Windows 8.1 that it does not seem to like.
This was the response just received from On One Software.
Go to: C:/Users/(your username)/AppData/Roaming/onOne Software/Perfect Layers 8
In here, delete the file "PerfectLayers8.ini" (the extension may be hidden, you can right click > Properties to confirm it is an .ini file)
Also, AppData is a hidden folder, you will need to make sure your folder options are set to show hidden files and folder.
- Delete the Photoshop settings files:
- If you are on a PC, hold down Alt, Ctrl, and Shift keys (Mac: Command, Option, Shift) while starting up Photoshop. A dialog box will appear asking if you wish to delete the preferences/settings file. Click Yes.
- Restart your computer.
4. Reinstall the program:
Thanks John, this is useful for us to know.