What platform and OS? How much RAM?

I saw lots of crashes during render when I was using the 32bit version on a 32bit OS with 2GB RAM.

Does it crash on every render? or just big renders?

I have been doing lots of renders with no problems with the most recent update. I'm using the 64bit version on Win7 Prof 64bit.

If you have been rendering with no problems for some time, and then DAZ started crashing all the time, I would check if there is some hardware issue. Rendering in DAZ stresses your computer more than most applications.

On a PC check the system logs for errors.  If you have any hardware diagnostics, try them.