BTW, quick tip I picked up about a week ago. In Fusion 360 click on your name in the upper right corner and select preferences, then under General → CAM click the “enable cloud libraries” box, then restart.
Then you can go to the Autodesk 360 website (https://360.autodesk.com/#/Item/Items) and upload the post processor to the CAMPosts folder there. This will mean you can access the Easel post directly from the cloud instead of finding the directory on your machine to put it, and if you use multiple machines or reinstall a machine you don’t need to think about it.
Once you set up your setup and toolpaths you right click on your setup and select “Post Process”, in the Configuration Folder select “My Cloud Posts” and the configuration is f360-easel.cps. Then pick your output folder and anything else you want to change, then click on the Post button at the bottom and you’ll have the .nc to load into Easel.