Download the v0.6 OTA update binary from here:
Connect to the LaserCube in WiFi Server mode, as described in Initial Setup.
Browse to 192.168.1.1 and log in using the following credentials:
User Name: LaserCubeUser
Go to the Update Tab. Click Choose File and select the update binary. Click Upload.
Wait for the update to complete and the LaserCube reboot.