I haven't really used it enough to see how stable it is. I was surprised they released any new updates as they had just released version 6. Most companies just instantly abandon the previous version and expect you to update if you want bugs fixed.
And to be fair to the devs, the crashes are probably more to do with my older PC than any bugs in the software. The newer features are a bit heavier on the GPU and mine does creak a little under the strain.