Firmware 6.3.1 for Balance 380 HW1-5?

Is Firmware 6.3.1 available for Balance 380 HW1-5? It’s not showing up on InControl2 and I don’t find it in manual downloads, but this thread seems to say that it should be available.

Thanks

Please refer to the release notes here:

Starting with firmware 6.3.0 onwards, the Balance 380 HW1 & HW2 are no longer supported and the latest version for those is 6.2.2