This has been happening to me as well since day one of release. I have been using Designer 1, and never once that this problem EVER. Now, no matter if I mouse wheel zoom or drag zoom, it crashes. Sometimes its something simple like adjusting points of a line etc. In an hours time of using the program, it will crash without question about every 10 mins. Now any changes I make, be it color change, moving a line, attaching lines what have you, i have to save because i know it will crash soon.
Its to the point now, that I will no longer be using version 2 till this is fixed. This work flow is HORRIFIC, since writing this, its crashed 2 times and its been a whole 5 mins