MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Several thousand downloads and 99 successful "Made" posts tells me that maybe it's more to do with your print than my design. Yes, it can snap, if you're not careful when you mount it, but it's not THAT fragile. I was quite rough with mine and it never snapped.
That said, there have been a couple of people mentioning that it has snapped for them as well IIRC. And I believe there's a derivative design or two that supposedly takes care of that.
Also, you're welcome, I hope the price of "free" wasn't too steep for you...