Last night I flew the CRJ-550 and, it seems that the range knob is broken there, too. This was working, since I use it all the time. But, after getting the CRJ 900/1000, it broke.
The other issue I’m experiencing, where switches in the Saitek Switch panel stop working is only on the CRJ 900 and 1000, with the exception of the landing gear. In the 1000 doesn’t work at all. On the 550 and 700, it stopped working when lowering it.
It seems like the addon broke things on the existing CRJ 550/700.