Maybe that I shouldn't do a re-install, but I *had* to do it, otherwise there was no change in recognition of Sem in AnalogLab.
Oh, and another one: After recognizing Sem now, I can't edit or even see the preset params of Sem's patches (like Polyphony, Key Mode or LFO sync). They are greyed out or the popup menu has a "-" entry, nothing editable, have to open Sem to change those things:-((((