As of today we start the final countdown for RubyMine 2016.1 release. Please welcome RubyMine 2016.1 Release Candidate (build 145.596) that you can now download and try. If you have a previous Beta build (145.256) installed, you should soon get a notification in the IDE about a patch update.
Please take a look at the release notes. There is also a known issue about custom keymaps we are working on. If you find something critical — please let us know here in the comments or on our issue tracker.
The RubyMine Team