[Zope] mysqluserfolder access blown - work lost?

Hello I have added mysqlUserFolder to a folder that contained a lot of work I have done. I may not have entered the database connection parameters correctly (it was late). The upshot is that I can now not access anything in that folder. Removing the mysqlUserFolder product doesn't help. Zope 2.7.3 mysqlUserFolder-1.0.5 Any suggestions very welcome Thanks