Causes a crash every time for me on x3b is anyone else seeing it?

What Waves version did you install, or did you update that install when r after installing X3b?  You should be able to see this version on the Waves site, or during the Waves install. I prefer the offline installer to the online. It allows me to quickly re-install, add or delete plug-ins. The current version is "r14".

Doesn't happen for me. The only issue I'm aware of is that you're not supposed to mix VST 2 and 3 plugins from Waves within a session. Would be worth it to check that if you haven't already.