They do have the EU version (which is what we use) on the FAQ.

Just updated mine (unifi EU V1) to the beta firmware. It wipes out all your settings, so before upgrading, make sure you keep your unifi username and password handy.

Turns out the unifi specific firmware makes the router way shittier than it already is. After upgrading to the beta firmware, I noticed two big thing:
1. I no longer have to deal with the shitty @unifi thing on my SSID. It's no longer there.
2. There's a check for update button on the firmware settings page.

Waiting for the Malaysian specific update might take a while (and there's two version locally, the TM and Time version), so if you're comfortable dealing with your router settings, I dont see any issue with upgrading with the firmware they provided. If shit go south, just flash the old firmware back.