Safe Mode doesn’t load extensions so the description is from running LO normally.
I would guess that the last extension is causing the problem. Start in Safe Mode and disable Language Tools extension (Ctrl+Alt+E, select the extension and click Disable). Restart LO normally and see if it crashes, if not then you have identified the problem. If LO crashes with Language Tool disabled then you need to reset you user profile.
backup user folder
Close LO. In File Explorer (Win+E), in the View tab, tick the box Hidden items.
Navigate to C:\Users\[username]\AppData\Roaming\LibreOffice\4
right-click and drag the folder user to a blank space just below and release, click the context menu Copy here and it will create a copy of the user folder in case things go sour. Leave folder open for now
Reopen LO in Safe mode and tick the box Restore from backup > Restore user configuration to the last known working state
and press button Apply changes and Restart
. If it all works the carry on with using LO like everybody else.
If not then try the button Reset to factory settings > Reset settings and user interface modifications
. This should fix most issues. If not the Reset entire user profile
will reset everything back to factory settings.
If you did select the entire user profile option then all your autocorrect and templates will have gone. This is why we saved a copy. A new user folder will be created. Drag your data folders back into the new user folder: Autocorrect, Autotext, backup, template, wordbook.
Hope this helps. Cheers, Al