What limitations are in the trial version of Supertone Clear? November 07, 2023 04:07 Updated The trial version of Supertone Clear outputs noise every 60 seconds, until activated with a valid license key. Related articles I want to reset my activation status. How do I activate Supertone Clear? Is my license for Supertone Clear a perpetual license or subscription? Can I use the software on several machines? Why is my activation for Supertone Clear failing?