MicrOpay Error

I've a single user who is seeing error messages when trying to log in

  1. We updated MicrOpay from version 8.3 to 8.3 B2 hoping to fix it, no change
  2. Uninstall and reinstall, no change
  3. Uninstall using an uninstaller utility - to attempt to clean it up
  4. Installed again to end up with the above image, yet again

What else can we try to fix this?