except for the Add on programs, what is the difference between Movie Edit Pro 16 Plus and Movie Edit Pro 16? The comparison PDF is not available. Can I edit HD movies from my Canon 7D SLR with any of them?
The standard Movie Edit Pro 16 does not have AVCHD support, nor does it offer the multi-cam support. I wrote MAGIX a message saying that the link is broken on the comparison, hopefully that gets fixed soon.
I believe any standard HD format can be edited with either programs, I only have the Movie Edit Pro 16 Plus, I believe also the audio editing and as you mentioned the other add ons, number of tracks, effects, transitions, and export features are expanded in the "Plus" version.
I would recommend the plus if you are looking to do more that one project, it really does open your mind up for different possibilities.