Hello, I'm french so sorry if I don't speak very well...
Yesterday, I had the previous version of Construct 2. All was OK.
Today, I have downloaded the new version, and I cannot see a preview of my game. When I have re-installed the previous version, the problem has disappeared.
But if it's possible I want to enjoy the new version, especially because Firefox 5 users cannot play my games with the previous version.
I hope that I was understandable !