To Move the license to another computer, do the following steps:
1 – Log in to https://extreme-addons.com/
2 – Go to your License Page: https://extreme-addons.com/my-account/ea-license/
3 – Click on “Reset Device” (If “Reset device” is not present, it means that this step is not necessary.)
4- Go into Blender and open addon Preferences with “Options” button into addon interface
5- Press “Extreme Addons” Tab Enter your Email / Password that you used to register at Extreme-Addons.com, and enter the license of your addon that you will always find on the License page
and press “Activate on this computer”. If everything is right, the key icon on that button turns green.