duplicates in RB 3, what happened to the show duplicates menu option?

i just found out that i have alot of duplicate tracks in my rekordbox.

i checked the location of the files, and they are the same location, so rekordbox has 2 records of the same file in the database.

when i change cue points in 1 instant it changes it also in the other one.

this is quite annoying, especially since the option to show duplicates is gone

any help on getting my database cleaned up?