This bit is simple. I only piggy back on the regular find bar. Just open it with Ctrl-F (or whatever your platform’s equivalent is). Hopefully you’ll see a “Regular Expression” checkbox. Tick that then stick the regex into the find box. You don’t need to surround with /’s or anything. The “Match Case” checkbox works as it should. If you don’t see the checkbox then you’re either seeing a bug, or are on an unsupported platform (Windows-32bit and Linux-32bit are currently supported. There is an experimental Linux-64bit support though that is untested).