Need some help with new 4630 dev kit, cant program device

I have just setup a Rak4630 with a mini base board, I a have installed and have meshtastic compiling for the board, I can’t program the device.

I get this error:
Starting DFU upgrade of type 3, SoftDevice size: 151016, bootloader size: 39000, application size: 0
Sending DFU start packet
Timed out waiting for acknowledgement from device.

I tried updating the bootloader using the adafruit-nrfutil.exe tool I also get the same error.

Looks like the new RUI firmware has a different bootloader, How do get the old bootloader on so I can flash custom firmware for

Welcome to the forum @Matt

We have guides to convert between Arduino Bootloader and RUI3 bootloader in our Documentation Center
==> Converting RAK4631-R to RAK4631
==> Updating RAK4631 to RUI3