Designer crashes when trying to add a new device

[yyogev]

Steps to reproduce:

Open Designer
Under "New Projects", select "Sencha Touch 2.0.x"
In the canvas area, click on the device selection drop-down menu and select "Edit Devices..."
Click on "+ Add New Device"
An error message is displayed: "TypeError: 'null' is not an object"

[jjohnston]

Thank you for reporting this issue; it has been fixed.

[lorezyra]

Lovely bug... This just killed my project... >:)

Is there a new release for this beta?

[aconran]

Build 276 was pushed out this morning.