The directory I was referring to was the per-user configuration directory for SlickEdit, not the AppData or ProgramData directories. This is the directory that is specific for each version. In the Help > About SlickEdit dialog, on the Program information tab, you'll see the "Configuration Directory" information. It'll end with SlickEdit\<version>, e.g. SlickEdit\17.0.1. That's where the license file should go.