I just upgraded to Membetship 2.1.1.
I noticed that there were no gateways listed so I enabled PayPal Express with Subscriptions to try it out.
It is set to Live and it seemed that my PayPal business account should support it.
My Signup form has a "Profile Details" header, but no BP xprofile files listed below.
So I enabled PayPal Single Payments Gateway which seems to also be called PayPal Express - with Single Payments. I think this is also called Solo?
Still no BuddyPress extened profile fields on the signup form.
I checked in BP Profile Fields and tehy are still listed.