Stonehearth Won't Open?

I downloaded SH as soon as I saw it a few weeks ago, since it was on Steam early. And as I saw it properly released the other day, I races to Steam to update SH but alas, it doesn’t actually open. I’ve tried a couple of times, and even restarting my PC, but it simply won’t open. :(. Does it not work on XP or something?

Oh, and as a side-question, I donated $50 on Kickstarter all that time ago, and I’m just wondering where I can get my second key to give to my friend?

Cheers.

I moved 5 posts to an existing topic: [Ack] SGT Bug: Windows XP not yet supported