This license key was used to activate extension in your website.
However, since September 19th, 2013, the license policy of Magestore has been changed into the license certificate policy. Therefore, we don't provide license key to customer anymore and use License Certificate instead. Each License Certificate includes a license serial which is valid for one live Magento installation only and unlimited test Magento installations.
And you must NOT enter the license serial into the license key management section in backend. (System/ Magestore Extensions/ License Keys). These fields can be left as blank. The installation process only require license certificated generated in your Magestore account. If the system ask for license key, you can ignore and continue on the next steps .