The first release candidate for Betaflight 4.2 is out, and there is also a release candidate for Betaflight Configurator to go with it. All we need to do is fix a few more bugs to make sure everything runs smoothly, and then Betaflight 4.2 will be ready for prime time.
If you want to help us with this, head over to the Betaflight Configurator release page, grab the latest Betaflight Configurator release candidate, and use it to install the latest Betaflight 4.2 release candidate onto a craft. Make sure to read the release notes while the firmware is flashing, then head over to the 4.2 Tuning Notes to get a run down of how to tune Betaflight 4.2. If you find any bugs or problems with Betaflight 4.2, use the issue tracker to check if it has already been reported, and if not, please open a new issue. Thanks for helping us make Betaflight 4.2 even better.