Unfortunately the SRXL communication protocol of some SPEKTRUM receivers is not fully compatible to the SRXL specification (i.e. AR9020, AR8010T, AR9030T, AR9320T). We provide a special MICROBEAST PLUS firmware with modified SPEKTRUM SRXL protocol so that these receivers can be used anyway. You can get this firmware using the update functionality of StudioX. It has the same version number as the standard firmware but is additionally marked with the words "SPEKTRUM legacy SRXL".
Note: This firmware does not allow to use any other type of receiver, so Receiver setup menu point A will be skipped automatically when you enter Receiver setup menu! Otherwise this modified firmware does not differ from the default firmware.