I also think it is win7 and Unicode (then V2 had also problems with malformed sqlite) and the V3 version i made up (with doing things binary) choked also on a 0x81 being an "unprintable ." instead of ANSI "ü" which it should be. I have no XP to test. But as for it works in the original V2 version fine on Linux and I converted all my needed dictionaries, and I lack time (and python knowledge as well :-) I also can not go deeper now.
Anyway, there seem not to be too much people seeking this... a week that nobody than us two is writing here.
I thank you again for your help, AlPe and wish you nice days.