How do you change the current release of a Ruby on Rails application that was pushed up to an Ubuntu server with Capistrano to an earlier release?

These files are located in /var/www/application/current
I want to go back to the rails application dated Sep 30 and put it into var/www/application/current which is currently pointing to a release dated Oct 11
I am currently running Ubuntu 12.04, Rails 3.2.7 and Ruby 1.9.3
Thanks in advance!
the current is a link to the release folder so all you have to do is point it to a different release folder ie
and restart the app
keep in mind if there were migration changes you might have to roll them back as well …