Yesterday I started using Balsamiq via Google Drive to try it out. And creating my first mockup, I started to like it.
Today I tried to open the project, but after briefly displaying the smiley loading icon it just says "flash player 10 required"
Another small file that I created yesterday as well opens without a problem. Interestingly the "flash player required" screen very briefly pops up just before it loads the project.
I am using Windows 10, Flash Player 18, Chrome (although same problem with Edge and Firefox).
How do I open my project?