I submitted one of my papers to an IEEE conference: NGCT 2015 which is supposed to be happening soon (the final paper submission deadline is gone) and I had submitted my paper in PDF format, written in latex, without getting it approved using PDF express plus.
Is it necessary that I should have submitted the PDF express plus paper? If yes, do I still have an option of changing the submitted paper?
I tried contacting the conference organizers but they were unreachable for quite sometime now.