For **LoadRunner v12.5x** - simply install the controller software. The Community Edition license is automatically included/installed.
For **LoadRunner v12.6x** *ONLINE* registration (i.e., your controller has Internet access) - click here:
https://eyeontesting.com/questions/18204/how-to-i-obtain-my-loadrunner-v126x-community-edit.html
For **LoadRunner v12.6x** *OFFLINE* registration (i.e., your controller does NOT have Internet access) - click here:
https://eyeontesting.com/questions/18210/how-to-i-obtain-my-loadrunner-v126x-community-edit-1.html