You will need: ADB, ADB Drivers, and a rooted device.
Plug in your phone into your computer.
Run the following (in CMD) :
1: adb shell
3: am start com.sec.hiddenmenu/.Program_Edit
It should open a menu with your MSL at the bottom. Hope this helped!
I have tested this on Android 5.0.1 and Android 6.0.