Preflight tool opens but empty
Hello, I have Acrobat Pro 2015 64 bit on a Windows 11 machine.
When I click the preflight icon it opens the box but it is empty. It has the 3 icons at the top but if I click one a window poops up that says "unable to load user preferences" or something to that effect and it crashes Acrobat. I've included a screenshot of the blank preflight box. This tool worked flawlessly on my previous computer which had W10.
I have all available updates, I've uninstalled and re-installed and also tried to repair the installation.
Any help is greatly appreciated.
