There have been 3. You are forgetting the 2.0 version that came out between the first one and the 3rd (current). See your posts #3 and #5 at the link below. In our conversation we are talking about the 2.0 module, which was before the latest one with the dual connectivity.
http://radarandlaserforum.com/showth...odule-Problems
In any case, I'm right as the first one can't upgrade the ALP firmware via BT, v2.0 and 3 (current) can. Also, and I may be mistaken on that one, V1 and V2 are deprecated so they can only operate with older firmware installed on the ALP.