Steam version wont launch after title changed to Age of Empires II (2013)

I haven't played in a month or so, the last time I played it was still called Age of Empires II HD in my steam library, and the game desktop icon looked different. I don't know when exactly the game title switched to "Age of Empires II (2013)" as I didn't notice it when it happened, but now the game won't launch.
I get the initial desktop menu of "Play, Workshop, AOE website, Achievements" and when I select Play I get the "validating subscriptions" splash screen but it crashes immediately back to the desktop. No error code, nothing, just an immediate crash after the validating subscriptions screen shows up.
I was playing it fairly regularly not that long ago, when it was still titled Age of Empires II HD edition in my steam library, and it ran flawlessly on my system, so Im assuming that whatever patch was released to change the name of the game, also somehow made it unplayable on my system/account.
Does anyone on this subreddit have any advice?
Any help would be greatly appreciated.