To enter a license key in LiteManager, you should open License manager from the main menu of the LiteManager client module (Help → License manager).
In the opened window enter a license key and add it in a list. You can add several keys.
The license key will be added in the main list in case the key is valid; otherwise a message about the invalid key will be displayed.
Close License manager. To activate the license key, you just need to restart the program.
After you restart the program, the caption in the title bar of the program stating that this is a demo version will be removed.
Additional help information
LiteManager licensing