Locating History Files

Yesterday I imported some histories from my usb, and as it was sincronizing, I deleted some of my tags, all froze out and then my usb was corrupted, but that is not the problem. 

I had to force quit rekordbox, and when I opened again it said that only could read the data base from like an hour before. So the histories that I imported yesterday don't show on rekordbox and of course they don't show on the cdj cuze I imported them.

I think they histories are in the hard drive that I use as a database, as I imported them. So I would like to know how to find the history files on my data base, as those histories are really important to my work.