This mod makes it so that the Dark Brotherhood will only send Assassins after you have finished the main quest. It doesn't matter if
you did the normal way or the backdoor way.
All I did was add this to the dbattack script:
if ( getJournalIndex C3_DestroyDagoth < 50 )
return
endif
1. Extract.
2. Drag and drop into your "Data Files" folder.