Can't Save, Can't Publish in New Version

I'm opening an old Animate file and am presented with this message: Dropbox - Screenshot 2014-10-06 12.47.34.png

I then make a change to the file, and attempt to save:Dropbox - Screenshot 2014-10-06 12.43.09.png

and am presented with this message: Dropbox - Screenshot 2014-10-06 12.44.10.png

Could someone explain to me what I'm doing wrong and what I need to do differently? Or is this a bug in the new version of Edge? Thanks!