I solved it a while back, actually, but I might as well mention that I think what was causing Hex to crash was an orphaned second install of the game in a different spot and probably from an earlier version.
I was just kind of proceeding in maintenance mode for a while here - couldn't seem to get a campaign deck together that was reliably successful, tried netdecking a cheap arena deck or two to grind gold and equipment (and some of the early run of PvE cards, for that matter) but couldn't seem to get that to perform at perfect or near perfect standards the way they were advertised either, presumably because I didn't have the equipment they wanted (and not necessarily all the rares/legendaries they wanted either). Because while I have a huge card pool from KS rewards and drafting, the only equipment I'd gotten was the KS bonuses and a little tiny bit from campaign and arena runs in the past, and a couple from chests. But I don't like opening my hundreds of chests without spinning them and even spinning common chests is a drain on the limited gold I've had access to without being able to do consistent arena/campaign clears. Most people would just go to the auction house, spend a little more cash and fix things that way. I've been reluctant because I a) hate auctions, b) hate player economies and c) already spent $500 on this thing.
This weekend, though, I finally got a capable Shin'hare deck together for my cleric, based loosely on this: http://fiveshards.com/next-level-pve-decks/#Shin8217hare_Cleric_8211_Mokog
I had to tweak it because I don't have the Chef, Mon'suun, the Cottontail Recruiter, the Bucktooth Roshi, or the Engorgers, and I have hardly any of the equipment. But I do have a full playset of Vampire Kings, a full playset of Darad the Scourgeblade, a Minion of Yazukan and one or two other shinies. So I slapped in one each of the Vampire King and Scourgeblade, the Minion, a Wretched Brood, and I think one or two other handy fellows and used equips for Blossoming Concubunny, Feeding the Young Ones, and the two for the Scourgeblade, since I had them. Sometimes I chip my way to victory with pumped up Hopper hordes, sometimes I rock big swinging Commanders and Keepers, sometimes Uzume spawns a bunch of fancy doubled Shin'hare thanks to the Ritualist, sometimes I chain sacrifice Hoppers to Hop'hiro until his Warlord stage and then it's a total board clear in the next couple turns, occasionally I chip away with my Vampire King and Scourgeblade... I have won so many different ways off just this one deck, particularly when the encounter synergizes nicely (like the one where you get prophesies off every troop that comes into play). Love it love it love it. Made it to level 5 over the weekend and cleared the first couple of dungeons without a single life lost. Then I ran into the Makeshift Barricade and that was a total roadblock. Even with 28 health there's no room to build board position while being hit for 3 every single turn, and those walls mean there's no way to get early chip damage through, and of course Kill fails me as well. Probably going to have to swap them out for Wild artifact removal and make a couple other tweaks.
Then I got a dwarf artifact aggro deck into a couple perfect tier 2 arena clears (with Princess Cory the boss both times - what a hilarious fight), with good success on tier 3 until hitting Xarlox the Broodlord. And that guy....that guy I miiiiight be able to beat with the right opening hand, especially if his draws sucked...but I sure wasn't managing it today. Especially not after our friendly arena overseer gave him a free extra turn both times I fought him in the first run and an extra 7 health and 2 card draw both times I fought him the second run. Yeesh. On the plus side, that deck is hilariously effective even in very low resource situations. I rarely got above 3, occasionally four resources and made pretty respectable showings even at one. And I didn't even have the Reese the Crustcrawler (currently one of the most expensive legendaries in the game), VB1311s, or Construct Guild Foreman that the original deck called for (I subbed in a couple Rocket Rangers, which work quite well, and a Crown of the Primals, Eurig the Robomancer, and Slaughtergear that have basically never seen action and I should probably ditch even though they are hilarious.)
I'm loving it enough at this point that I think I'll probably just invest in some of the cheaper rares/legendaries that these decks are calling for and to heck with it. Realizing that aside from a few power cards like Phenteo (so happy I got one from my KS packs), Mon'suun, Vampire King (four natural pack draws!) and Reese, most of these cards are selling for $5 or less, and the equipment for mere cents most of the time, made that a lot more palatable.