Unable to switch app


I've setup a multiple-app project, which contains two apps. I can select both apps in config mode on the ESP8266, but for some reason when I switch, the new app never gets installed (yes, I did tap the Save button). Also, if I tap the Back button and return directly to Edit Project page (which btw has the title New Project), the old/current app is selected.

I'm using library 2.1.0-RC5.1 (although my dashboard shows 2.0.X).

What am I doing wrong?