AP One Rugged Firmware

Hi all,

just purchased the new AP One Rugged and it came out of the box running firmware 3.9.2.
The latest firmware for download listed on Peplink support is version 3.6.3 which also corresponds to the user manual. Tried to download and install 3.6.3 but got an invalid firmware image error.

Is there a way to install 3.6.3? Reason: there are feature missing in the installed firmware 3.9.2, which are shown in the 3.6.3 owners manual (mainly assigning VLAN to the ports).

Thanks,
Erik