I had a similar problem copying all my files to a different computer. Look at your message. Is
"G-DRIVE Mini:backupdb:Macbook Pro 15" 2010-01-05:Macintosh HD:Applications:Traktor"
really where your root directory belongs? Looks like an external disk. Unless you moved some stuff around, it should be something more like
"Macintosh HD:Users:username
ocuments:Native Instruments:Traktor:"
On mine, the problem was that it was looking for my former hard drive, which had a different name. Unfortunately, removing Traktor doesn't remove this pesky little file that store the location of the root directory. I fixed mine my editing the file.
Go to "~/Library/Preferences/" (~ = your home folder, e.g. "Macintosh HD:Users:username") and open "com.native-instruments.Traktor Pro.plist" with a text editor. Near the bottom is a line reading
" <key>RootDirectory</key>
<string>[old directory from warning]</string>"
Replace the path between <string> and </string> with the path to the correct root directory (should be "Macintosh HD:Users:username
ocuments:Native Instruments:Traktor:", with your Hard Drive name and Username.
Alternatively, you could try just deleting this file and reinstalling Traktor. I haven't tried that, but it's worth a shot.
Good Luck!
--DJ Fitzgerald
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