I get error after loading office 3.6. Says Invalid Registry Exception
Related to held over per-user extension configurations from prior installations.
Should resolve if you rename C:\User<username>\AppData\Roaming\LibreOffice folder.
Or more specificaly delete the …\LibreOffice\3\user\extensions folder. But if only clearing that, should also delete the javasetings_Windows_x86.xml in the …\LibreOffice\3\user\config folder.