Aeotec Provided 7.20.2 Firmware for USB 700 Stick

I notice that Silabs has released firmware version 7.21.4 but it looks like it’s not available from Aeotech yet. Does anyone know whether you can flash the controller with the generic Silabs firmware and which version of the gbl file to use?

Any news on where we can find the firmware 7.21.4 or later for Z-stick 7 ?