JLAB_ADDPATH is in the main directory of jLab.

 JLAB_ADDPATH  Adds JLAB and JDATA subdirectories to your Matlab search path. 
 
    This script adds JLAB and JDATA subdirectories to your Matlab search path.
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    This is part of JLAB --- type 'help jlab' for more information
    (C) 2015--2016 J.M. Lilly --- type 'help jlab_license' for details

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