The first time you first launch SQL Query Tuner, you will be prompted to activate the product. Choose to activate by Internet and follow the prompts. During the activation process you will receive an email with an activation key; after you enter that key into the License Setup dialog, you will receive a free 14-day evaluation license.
If due to firewall or other restrictions you cannot use Internet activation, select the E-mail alternative.
To continue using SQL Query Tuner after the evaluation period, select Help > IDERA Licensing > License Registration and follow the prompts.