If you can't find it, odds are it's not ready yet.
"You don't lose levels. You don't have equipment to wear out, repair, or lose, or that anyone can steal from you. About the only thing lighter than debt they could do is have an NPC walk by, point and laugh before you can go to the hospital or base." -Memphis_Bill
We will honor the past, and fight to the last, it will be a good way to die...
You could always check the Mids' Hero Designer forum at Titan Network.
As a general rule of thumb, though: Titan Network tries to put a lid on anything in closed beta, and the Mids' team doesn't release updates until Live. Mids' is intended to be a reflection of the Live CoH build, not Test. It's possible for users to edit their database to insert data that's on Test, but there is no guarantees about compatibility between user-created database edits, builds saved with those edits, and an official Mids' update.
http://www.fimfiction.net/story/36641/My-Little-Exalt
I've been looking around, but I cannot find anything on a potential update for Mids' Hero Builder for Issue 17 and Demon Summoning. Anyone out there know if an update is in the works, if one's already available in some dark corner of the interwebs, or if we'll be waiting until later (possibly Going Rogue) before we see an update?
Again, I've searched here - using mids, mids', hero builder, Issue 17, and Demon Summoning in a varitey of combinations - to no avail. I've checked the Mids' site, here, but it still shows the last update which added Dual Pistols back in March.
Any help and/or info would be much appreciated, and, as always, links to relavant sites/posts are great!