Just downloaded and indexed the above, but no sign of any interlinear functionality when looking at an NT passage. As far as I know I have a license but the rather vague "If you have Logos 4 installed, a license for the NIV 2011 with reverse interlinears" doesn't help me decide if I do.
I can't find any reference to an "NIV 2011 with reverse interlinears" on logos.com only the NIV2011. I have rev. ints. for everything else.