I have just down loaded and installed Roxio Toast 15 Pro to my Mac Ver 10.12.3. I have followed the instructions on page 17 of the Toast 15 guide. The app LSC seems to start ok but it will not stop when I use either the Stop button or the commands Control>Command>1 (per instructions). The only way I can stop the app is by using Force Quit. Any help on this issue would be appreciated.