I had this same problem with the new GUI . The solution was to change a line in the install parameters file to fall back to the prior GUI that we have all grown up with.
Here is what is at the end of my global.ini file in the Desktop Edition/x64 directory
[NewGUI]
NeverLaunchSessionManager=Yes
UseOldUI=Yes
I do not think there is a way to accomplish this in a .zmd file