Success! Looks like we've fixed this one. According to our records the fix was applied for
a recent build.
Touch Premium Member
Crashing when saving settings
Created a really simple panel (literally just droped it on the work area) in EXT designer 1.2.2-48. Save project and its ok.
Opened it in Sencha designer,
Went to project settings to see how to setup CSS (which I still cannot find), tried to save the project settings and voila. error message:
TypeError: 'undefined' is not an object
Thanks for the report i have confirmed this bug.
Sencha Designer Development Team