If you're a Mac user & you've bought an SCS3d or SCS3m unit and are wanting to use the bundled Traktor LE software, you must use Traktor Pro 1.2 for the presets to be functional.
As of the date of this post, Native Instruments have not officially released this version yet, however users can get the final pre-release phase ('Public Beta') if they are desperate. NI are supposed to be releasing this update any day now, so there won't be too long to wait if this has been an issue for you. ( I haven't actually heard of anyone having an issue, so this post is here 'just in case').... FYI the new update is a ripper, double the number of FX units and many tweaks to the customisability and functionality of the program. See the list of improvements here
If you have Traktor Pro or Traktor Scratch Pro / Duo there are no problems with compatibility providing you are using the current update (version 1.12).
Users with XP / Vista can use DaRouter presets with Traktor LE & the SCS3 system with any version beyond 1.12 without any issues.
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