This options helps you to review your License Details and enable check for updates automatically.
In the License Manager option you can enter your license details Registration name and License key after purchasing a license. Your license key controls how many servers are able to register in SQL DM for MySQL. If you are using a TRIAL you can register up to 512 servers, but after TRIAL expiration, a license key is required and only the number of MySQL servers that you have license for will be available. So be careful to enter a license key for a proper license before TRIAL expiration. When logging on to a unregistered SQL DM for MySQL instance running in TRIAL period a similar license manager is displayed before you have access to the logon screen. As long as the TRIAL period has not expired you can skip the registration and continue to use SQL DM for MySQL on TRIAL terms.
Enter your License Key by using the Settings -> License & Updates. Enter the Registration Name and the key in the appropriate fields.
Using the Update Manager option, you can check for updates manually by clicking the Check for Updates button and also you can select 'Yes' so that the SQL DM for MySQL will automatically check for updates once per day.
To receive a notification on SQL DM for MySQL updates automatically, set up in Settings -> License & Updates, and enable Check for updates automatically? under UPDATES.