I know it must be me, but I can only open a project file one way with version 2.10 of Firefly... load Firefly.exe first, and then select the .prj file from the Existing tab.
I cannot associate .prj files so that double clicking them from Windows Explorer loads them. Nor can I use Open from the Firefly File menu to open .prj files. Each time I get the error message: "Error parsing the project file."
The project files created by Firefly 1.09 loaded perfectly. I have tried loading the project file the first way and then using Save and Save As, but that didn't help. Hope its not something dumb I'm complaining about.