[SOLVED] DJM 900 update problem

I just updated my DJM 900 Nexus from 1.1 to 1.28 and I don't like the new filter or the fx so I wanna go back to 1.1 but I don't know how. Can I download the 1.1 somewhere or can I reset the mixer to original software?

I know this is probably unusual to wanna go back but I liked the older one better and I don't use a computer so I don't need the new updates.