Well Dave Hikel had the meeting last fall. I also thought you could take it to the MTH booth to upgrade as well.
To the best of my knowledge, there is no DCS Users Group gathering scheduled for April, and, no, you cannot get the upgrades done at the MTH booth (again, to the best of my knowledge). Try your local--or perhaps not-so-local MTH dealer. It really does make a difference when these dealers disappear, and there are some things that the Internet can't do for you.