To open Easel, you just need a webbrowser. Go to: https://easel.inventables.com
You’ll see this screen (if you are already logged in, this screen may be automatically skipped):
Click the “sign in” button – then you’ll have a screen where you can create an account with your email address and choose a password, or you can log in if you already created an account. After logging in, you’ll get to this screen:
If this is the first time that you use Easel with your controller, then the button “Carve” in the top left corner will be blue. Click on it, and it will prompt you to install a driver. You can install it.
Then, next times that you will open Easel, it will show green when your controller is connected on a USB port (If this is not the case, and particularly with Windows computers, it may be that the button is still blue and when you click on it that you are asked to manually enter a COM port – that will be a lower number, like 0, 1, 2, 3, 4 or so):