Software license file used by Scarlett Plug-in Suite, a program used for authoring sounds; typically uses the filename convention ScarlettPluginSuite-License-XXXX-XX-XX.fnlf, where the Xs represent the date of activation for the license.

You can install your FLNF software license file by opening Scarlett Plug-in Suite and clicking the "Install License File" button. Once installed, the button goes away. If you don't have a software license the first time you open the software, a software activation box will appear and you can submit an activation request and then install the retrieved license file.