Thanks for the fast update! I've updated to the latest version but it's still crashing on me when I press F1... Perhaps it's been patched yet again :/
Indeed they have, 7.3 MB worth of patch downloaded this morning, although they did say they would release this patch here: forums.steampowered.com/forums/showthread.php?t=2222193
It's apparently to fix a bug that prevented a file to be created for new installations of PTH after patch 1.03.