I have now started experimenting with my WORKING lmce install.
PLCBUS1141 works perfectly, but I discovered one funny bug. Here is what I found, testing a non-dimmable plug-in module (PLCBUS-2027U).
When I add a non-dimmable lamp (device template 37) in web admin and set the channel number, the lamp will work perfectly (after reloading router of course) UNTIL I choose a Floorplan object type for the lamp. As soon as I set the lamp to any of the floorplan objects, the lamp turns into a dimmable lamp. That results in a lamp that I only can turn off, but not on.