This version can be installed side by side with Ext Designer 1.x, instructions are available in the Sencha Designer 2 forum.
Please note that, for the moment, there is no off-line registration for Designer 2 yet. You will need a computer with a working internet connection to make use of the software. Off-line registration will be activated at launch.
Projects created with Ext Designer 1 for Ext JS 3 will not work with this new version. Ext JS 4 projects might or might not load, please report bugs to the Designer 2 Bug forum.
Thank you very much for using Designer, we are looking forward to your feedback.