How do u add files to duplicate dector DB

I have over 200k files that i downloaded already. i don't want to re download them again when using newsbin 6
is there a way to add them to the Duplicate DB like the old sig generator in version 4.3 otherwise the program is unusabe since when i go to a group i would be downloading things i have already d/l and would have dupes of everything unless i saw it and realized i had d/l before
is there a way to add them to the Duplicate DB like the old sig generator in version 4.3 otherwise the program is unusabe since when i go to a group i would be downloading things i have already d/l and would have dupes of everything unless i saw it and realized i had d/l before