How can I switch back?

I installed RVM, then installed Ruby 1.9.3, then ran gem install rails.

Running rails -v I can see that I have Rails 4.0.0.rc1 and I don't want to use that version as it's not supported on my hosting provider.

How can I install Rails 3.2.13 and have that be used as default when running rails new commands?

ruby-on-rails ruby rvm
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