In v2.1, when you run the App Builder it will now restore the previous development session.

It will open the previously opened App and all of the editor files are re-opened then positioned on the last line that was selected.

This can be disabled in the App "Settings". If you have any problems opening an App just start the App Builder with --reset on the command line.

You will also notice that the UI has been modernized with a flatter appearance overall.

There have been many improvements made in the Lianja PhoneGap App generation as well as numerous improvements in the Web/Mobile HTML5/JavaScript code generation. This is all in preparation for v2.2 which will be a power packed release focussed primarily on Mobile App Building. Hint: watch this space for Material design and offline database.