I’m using the Glyphs Mini trial and when I try to save the font project I get the error:
“The document “new Font-Regular” could not be saved as “new Font-Regular”. Error with licence”
Is this a limitation with the trial version?
This seems to be a bug. I’ll have a look.
I downloaded the Glyphs Mini trial on 20th April and got the same problem as charlievaughn.
Just to let you know there are others having the same issue 
There may be other causes of this problem, but if you use BetterZip, which has been a stalwart in the past, it has a problem with Yosemite…the author is aware of it. Under Yosemite it seems to extract files properly…you even get the proper icon for extracted files (usually getting a generic icon or one that shows apps as unlaunchable is a good indication of a faulty extraction)…Glyphs is one of the apps that BetterZip seems to extract properly, but the extracted file is actually corrupt.
Using a different extraction tool often solves the problem.
I experienced this exact problem. Using Keka instead, I was able to extract, install and license Glyphs without a problem.
So is this only an issue with the demo version or the paid version as well?
I don’t mind buying a licence, but if I can’t save my projects is a bit of a blocker.
I’ve downloaded the latest version 1.5.7 as your changelog said this issue was fixed.
It is now working for me.