Upon completing an evaluation of 4D v11 SQL and buying a license, when activating you might get an error message that says: "You do not have a license to use this product"

To resolve this issue, please delete your demonstration 4D v11 SQL license. You can view your licenses from the 'Update License' dialog box located in the Help Menu of your 4D product. Select the 'Help' Menu -> Update License -> click on the 'Licenses Folder' button in the lower left hand corner.

4D v11 SQL Licenses end in a '.license4d' file extension.

Then register the full 4D v11 SQL Product ID.