Hi Charles -- Were you ever able to resolve this error? I am getting a similar one. The graph theory explorer was working, then all of a sudden started throwing this!

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ERROR DESCRIPTION:

Error using matlab.ui.Figure/set
The UIContextMenu's parent figure is not the same as the parent figure of this object
Error in conn_displaynetwork (line 492)
set(hfig,'uicontextmenu',hc1);
Error in conn (line 4955)
conn_displaynetwork('init',CONN_x.Results.xX.nsources);
Error in conn_menumanager (line 119)
feval(CONN_MM.MENU{n0}.callback{n1}{1},CONN_MM.MENU{n0}.callback{n1}{2:end});
CONN v.15.d
SPM12 + DEM FieldMap MEEGtools conn
Matlab v.2014b
storage: 16226.0Gb available
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Thanks!