The following window will open with several text fields to fill. To do so, click on 'Request info generator'. To obtain the license, you will need to send us a little text file with some information.
Then, the following window will open indicating that there isn't the license.
Once launched, select the root folder of 3ds Max, then follow the procedure to install LH | Auto-Rig. exe file for your version of 3ds Max (there is a link in the email that we have sent you or in your space 'My download' on the site).