If you need to swap Dynasign license key due to defective player hardware or other reasons, please follow below steps
1. Contact Dynasign to reset the license you will use if that license has been activated on another player
2. Power on the player and wait until you see your contents running
3. Press Ctrl+F3 to bring up Dynasign license screen.
4. Enter the license key you want to use in the Player License field, then click on Resume.
5. Wait for 10 seconds, press Ctrl+F1 to quit Dynasign player software and wait for it to launch automatically.