Hey Nick,
In the case that you're looking to move all your settings as well, here's the best way to do it:
1) Backup your rekordbox collection on the old computer.
2) Copy that backup zip and the following files from the old computer to the new computer:
browseSetting.xml
FxUnitSettings.xml
KeyMappings (folder)
LightingDB (folder -- if you use lighting)
pad (folder)
PadFxSettings.xml
PlaySettings.xml
rekordbox3.settings
SamplerSettings1.xml
VideoSettings.xml
These can be found in:
Win 7/8/10:
C:\Users\yourusername\AppData\Roaming\Pioneer\rekordbox
OSX:
/Users/yourusername/Library/Application Support/Pioneer/rekordbox
You can overwrite the existing files on the new computer.
3) DO NOT LAUNCH rekordbox on the new computer yet!
You'll need to go into the rekordbox3.settings file and edit the following lines (these are Mac, so just look for the start value name pair):
<VALUE name="VisualizerDeck1Path" val="/Users/yourusername/Movies/PioneerDJ"/>
<VALUE name="VisualizerDeck2Path" val="/Users/yourusername/Movies/PioneerDJ"/><VALUE name="pioneerDirectory" val="/Users/yourusername/Library/Pioneer/rekordbox"/>
<VALUE name="itunesLibraryFile" val="/Users/yourusername/Music/iTunes/iTunes Music Library.xml"/>
<VALUE name="bridgeImportedLibraryFile" val="/Users/yourusername/Library/Pioneer/rekordbox/rekordbox.xml"/>
<VALUE name="masterDbDirectory" val="/Users/yourusername/Library/Pioneer/rekordbox"/>
<VALUE name="SamplerSaveDirectory" val="/Users/yourusername/Music/PioneerDJ/Sampler/Capture"/>
<VALUE name="RecordSaveDirectory" val="/Users/yourusername/Music/PioneerDJ/Recording"/>
Anywhere you see YOURUSERNAME above, will be the username path from the old computer; replace it with the appropriate value from your new computer. If you don't have all of these, don't worry.
IMPORTANT! If you are on a Mac making these edits you'll likely be doing them in the TextEdit app; open the preferences and disable Smart Quotes otherwise it will break your settings file.
4) Launch rekordbox, import the library from the zip file (don't unzip it). If you're running rekordbox 6, it will ask to convert it.
That should be it! Let us know if you have any other questions.