If you'd like to beta test Recabinet 3.1, there's a public beta page I've set up for those who are interested:http://www.recabi.net/recabinet-3/download-demo/recabinet-public-beta/
This version introduces a completely rewritten audio engine that provides more efficient CPU utilization, as well as improved sound with better dynamic response. Additionally, the keyfile importer now has a dialog indicating successful registration, and instructs the user to restart their DAW.
You may need to adjust your presets due to the aforementioned sonic improvements, but don't worry - Recabinet 3.1 will reside on your drive separately from previous versions of Recabinet 3.0.x, so you can use both versions simultaneously.
Please write back if you discover any bugs, and describe them in detail. Thanks!