Double click on the BMTv3-RC shortcut on your desktop
Click on the update tab highlighted in blue on the image.
Click on the update bmtrc button
In the update panel you will see the available updates.
Note: when installing updates do one update file at a time this mean select one file and click get updates, then restart the BMTv3-RC each time, I have come across some issues when trying to update multiple files at once this might take a little time but in the end it is worth it.
When the download has completed click ok and close down the BMTv3-RC for each file update
Every time the BMTv3-RC is re-started you will get the file registration box
Your next step will be setting up the server login