RAK7289CV2 Upgrade Custom FW via WISDM

Good Afternoon All,

I am trying to figure out how to upgrade several RAK7289CV2 GW’s via WISDM with custom FW. I see the option to upgrade firmware, but only with official FW. Is it possible to upgrade via WISDM GUI? Or must it be done via SSH?
Thanks!

Just wanted to see if anyone had a concrete answer for this particular topic? Still having this issue, and wanted to double check here.

Thanks!