Audacity issues

Does anyone else ever have problems with Audacity causing their computer to freeze? Sometimes I have to open it several times just to be able to start using it. I'm not sure if it's related, but I've started to get messages on my computer saying that I need to close programs because I don't have enough memory (which is pretty much impossible--I have extra, and I'm usually only running a few things).

Other than that, I'm still having a hard time getting used to it. It's sort of counter-intuitive for me, but I guess I'm just not used to things like audio editing.