I decided to completely remove rails 4.0.0.rc1 and install rails 3.2.13.
I need instructions how to remove rails 4.0.0.rc1.
You can try this:
gem uninstall rails -v 4.0.0.rc1
Update:
gem uninstall railties
or if you already have more version installed:
gem uninstall railties -v 4.0.0.rc1
You can check which rails gem installed with gem list rails
Of course you can install after your desired gem:
gem install rails -v 3.2.13