if your mugen has all these words around and you dont like it you can get rid of it
1)go to your data folder
2)find mugen.cfgand open it with notepad
3)lokk For This: [Debug]
;Set to 0 to disable starting in debug mode by default.
Debug = 0 ;Set to 0 to disallow switching to debug mode by pressing Ctrl-D.
;If Debug = 1, this will be ignored.
AllowDebugMode = 1
;Set to 1 to allow debug keys at all times. Otherwise debug keys
;allowed only in debug mode.
AllowDebugKeys = 1
Make Sure It's Set Up The Way You See It Here
4)Save & Enjoy
5)yay you got rid of it 
[br]