When you purchase Hazel, you will need to register your copy to ensure you can continue to use all its features.
If you purchased using the in-app store, this should already have been done for you automatically.
If not, or if you need to register a copy of Hazel on another machine (like when you purchase a family pack), you’ll need your license file. When you purchased, you were given a link to download this file. In addition, you were emailed a receipt. Attached to that is your license file.
If you cannot find your license file, you can have it re-sent from here.
Once you have your file, you can either double-click it or drag it into Hazel’s window to register the software.
You will get a message about a successful registration and you should see your name in the license field in Hazel’s Info pane.