Just clarification on the plug-in: It bases the EQ curve on the fundamental pitch of the source material, so it will shift in response to changes in pitch. Meant mostly for instruments or tonal material (music) but also useful for sound design.
Highly recommend the ReaPlugs plugin set from Reaper. They are free and you can add them to your FL plugins. You will likely want to experiment with a muktiband compressor after the EQ so that you have a balanced sound overall after the pitch change in your signal chain. The ReaXcomp is pretty phenomenal. http://www.reaper.fm/reaplugs/#tour
Depending on the DAW this may be possible natively. I would recommend something along the lines of Bitwig (which is available for all major OS). It has a unified modulation system which allows you to do this to my understanding.