I don't know if the mid's creators are aware of this or want to try to figure out a fix, but after the swap ammo change (I'm guessing) DP builds can no longer be loaded, it calls the file corrupt and loads the standard blank mid's start page. I'll have to open that file on my old PC with the i17(ish) version and copy it over by hand otherwise I guess.
They're working on it. The Swap Ammo powers have been re-added in the next version of Mids'.
A workaround for importing Dual Pistol builds saved with Mids' planners prior to Issue 18 has been identified.
More information is available here (http://www.cohtitan.com/forum/index.php/topic,3363.0.html).