crashes a lot

iPad 4 retina. latest update to iDesign. almost anything i try to do, select an object, delete an object, editing an object results in an unresponsive program. very frustrating. i have to quit the application from the tray and restart and even then, when the document i was working on automatically loads its unresponsive from the start. the program is useless to me in its current form.

tomb123 about iDesign, v1.6.5