Apologies, it's a bug in the GUI. I removed the embedded files but forgot that _glitch_dn.ini and _glitch_tdn.ini are not included with multibuilder, so I'll put them back in the next release.
In the meantime you can either just check the box to include the launch.ini file (but don't configure one) or create these two files manually as follows.
In the ..\MultiBuilder 083\360_Multi_Builder_v0.83\Data\14719 folder from cmd prompt:
copy _glitch_d.ini _glitch_dn.ini
copy _glitch_td.ini _glitch_tdn.ini
Then remove the last line of the 2 files you've just created which is "launch.ini,"
This is just creating the filelists for xeBuild that don't include the launch.ini file.
Hope this helps!