Updating to RC, and Rolling back to 2.1.4

Hi,

I've got a live site with members and want to update but would like to roll back to 2.1.4 if there are too many problems that I cannot manage for the time being.

If I update to Membership 3-RC-1 and have unmanageable problems for the time being what's the best way to roll back to 2.1.4?

I'll be updating to 3-RC-1 using the 'auto-update' option in my wp backend.

Thanks!

(*WP 3.3.1. single site; Membership 2.1.4)