After some investigation, I believe this is due to corruption in the layout.xml file. Please make sure LogViewPlus is not running and then delete the file at:
%AppData%\LogViewPlus\layout.xml
That should resolve the issue. It is not clear why the initial corruption occurred, but it is possibly do to a versioning upgrade issue in a third-party library. I have updated LogViewPlus to be more aggressive in removing this file if an issue is detected. That won't prevent the issue, but it should resolve it automatically after an application restart.
Hope that helps,
Toby