In my case, disabling 64 bit processing not resolve the issue of crashing …also in 9.5.20 there’s some rendering problem with external VST (this is the thread were i’ve reported the issue [Wavelab 9.5] Render In Place make audio dropouts - WaveLab - Steinberg Forums )
There’s a way to return to a previuos update of 9.5 without uninstall?