Trying to continue the demo I had enjoyed the past 2 days (including earlier today). Hadn't finished it. NOw it doesn't give me a choice of playing or continuing the demo. When I click on the shortcut, on my desktop or within Steam, I get an icon asking me to 'purchase", not "play". What happened in the past 2 hours since I last played it? REstarted my PC, restarted Steam, etc. Very werid.