Create a branches.key file by clicking the Key Gen button in the about dialogue in the branches modify panel. Email your Branches.key file to info@branches.ws and you will be issued with a license file. Place this file in the same directory as the branches.dlo plugin and restart 3dsMax. The license is FREE but is usable only on the pc with the hardware configuration used to create the key file, and will be valid for all versions of 3.x.