Mine crashed too. But I was able to make progress by Rt clicking on the BIAB VST in the Instrument list and refreshing.
In my case, this allows the VST to open correctly. I haven't got it to work beyond opening but I'm sure there are some other Studio One settings I haven't yet found to adjust and get things going. It's just a matter of time, trial and error...
Thanks Charlie.Tried refreshing also still couldnt get to work,however!!!,I tried some of my NI Instruments in and presonus impact,quickly followed by a drag ove from biab to a blank track and it actually opened!
It did then crash my Edititors keyboard which meant i couldnt type the chords in.
The joys of an upgrade hey.