rails plugin install git://github.com/get/Rename.git will allow us to rename only rails 3 app
Is there any gem available to rename Rails 4 app.
I just used this rename gem in a basic rails 4 app:
https://github.com/morshedalam/rename
This is quite a bit different to get's version.
Easy enough to use:
Add this to Gemfile:
gem 'rename'
And run:
rails g rename:app_to NewName
Seemed to the trick,
It also updated my rubymine .idea project settings :)