Crashed!

Starting with the build 048, TKT will have a tab called "Duplicate Detector". We developed this detector tool to use in-house to filter out duplicate songs. TKSNS is fully supported so if songs were supposed to be duplicated but were not detected, make sure you have the correct tksns file(s). A song is a duplicate if it matches both the NAME and SINGER NAME, extension and album name don't matter. Vietnamese accent characters supported - for example Toi Dua Em Ve - Hoai Nam.vob will be duplicated with Tôi Đưa Em Về - Hoài Nam - Thúy Nga.mkv.

The use case is as follow:
1. You have your collection on, say D:\Karaoke\
2. Someone gave you a bunch of new songs and you put on D:\New Songs\
3. You want to know how many of the new songs you can copy w/o introducing duplicate copies

For the above sample use case, in TKT, go to the Duplicate Detector tab:
1. Select Folder 1 as D:\New Songs\
2. Select Folder 2 as D:\Karaoke\
3. Click on Detect Duplicate Songs. The duplicate songs found will be shown. Rest the mouse pointer over each song to see which songs (could be more than 1) in Folder 2 it was duplicated with.
4. To remove the duplicate songs from Folder 1, select them (Ctrl+A to select all) and right-click and select Move To and pick the folder to move these duplicated songs to. Always move to a folder in the same hard drive as Folder 1 to move the songs instantly (you can delete them later or copy to another hard drive using Windows Explorer outside of TKT)

If you want to get more granular use this tool Anti-Twin . Set it about 90% similar name.