your user profile seems to be corrupt - new installation or re-installation won’t fix the problem, since existing user profiles won’t be touched by an installation. You need to reset your user profile. I assume you are on Windows. If that’s true, go to Windows
Start menu and search for
LibreOffice (Safe Mode). Start in Safe Mode and if that works using
Continue in Safe Mode button, then you are sure your user profile is causing the problem. Do the same thing once more but now use
Reset to factory settings (option
Reset entire user profile). You may want to archive your user profile in advance (click on the word Advanced and then on button
Archive User Profile).
Hope that helps.
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