Release notes are available on Github, if Github downloads are too slow where you live you can use the mirror links below, but if possible use the Github releases page since it’s free.
Primary changes are that the new AWB algorithm is disabled by default on Buster, the LTM telemetry now supports N frames to show waypoint number on the old OSD, and QOpenHD has a significant number of fixes and improvements.
EU Mirror:
http://release.openhdfpv.com/Open.HD-2.0.0rc7-buster.img.gz
http://release.openhdfpv.com/Open.HD-2.0.0rc7-stretch.img.gz