The new 188.8.131.52 version for MAC is horrible! It's worse than the previous version. Constantly crashes every time you add a support. Will not stay open. I have tried rebooting, changing the file name, etc. Nothing works. I am going back to previous version if I can and "deal" with crashes, because there are less of them.
Also on PC. its absolute bullshit! I cant even place one support and it crashes on me. I don't know who is running your tech team, but how tf can you release something that doesn't work. You need to test your shit for a week before you push it to market. Please upload a rollback to the last stable version ASAP and take your time before you bring out 1.6.5
GO DO IT NOW. don't wait until after the weekend. get started now!