During install of the Thebat_home.msi I get this errormsg and installation exits.

Error 1714
Old version can not be removed.

I've deleted The Bat's homeland and all entries of 'The Bat' and 'The_Bat' and 'ritlab' in the reg.database. Can't find a trace of the bat anywhere. Still I'm getting the same errormsg.

Any ideas?