Never mind — I realized I needed a .glyphs2license file, not a .glyphslicense.
I recently transferred my files to a new computer. When I open Glyphs, it says:
The Licenese Information is not valid.
Glyphs will run in Demo Mode.
When I double-click to open the Glyphs License file, an earlier version of Glyphs opens and says
Thank You for registering Glyphs.
However, I want to use the new version. When I specifically tell my computer to open the license with the newer version, it says
The document “[name].glyphsLicense” could not be opened. Glyphs cannot open files in the “Glyphs License” format.
What is especially confusing is that even with all this, when I click on Glyphs > Registration… in the menu, it says that I do have a license. However, it still runs in Demo Mode (which I assume means that I can’t save edits I’ve made).
How can I fix this? I’ve already tried deleting the older version of Glyphs and doing everything suggested here, but it didn’t work.