When the program starts at first time (after installation), it shows the Welcome dialog that contains short information on accessing program menu and options.
In unregistered copy of Sigma Launcher this dialog contains Register! button. Click on the button to open order page in your default web browser.
You can use Enter code... button to enter the registration code.
OK button of the dialog is used to close them.
Edit menu... button - used to open Menu page of the options.
Help button - used to call Sigma Launcher help system.
If Don't show Welcome dialog is checked on General page of program options, the dialog will not remain on the screen in future.
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User Manual (Home) | Sigma Launcher Home