Cant reinstall 2.7.1 error config data corrupt. How to fix?

First, every time I tried to open a file I got 'file corrupted try to recover" I finally fixed that then spell check wouldn’t work - no dictionary found fixed that I thought then when I tried to spellcheck I got check complete but no check performed.
I uninstalled still no help then removed all instances of ‘LibreOffice’ in regedit. Now the above msg. Now What to do???

There is (and was) no LibreOffice version 2.7.1 - the earliest was version 3.3.