I tried commenting out the update gauge too. I think ACE can do it for you, but I don't think it works for P3D though.
I can't verify this because FSX is installed on my computer as well and so even from Prepar3D\Captain_Sim\777\ace, it changes the 777 FSX (well the Pax/Cargo changes in FSX). :(

Also, you should change the number on the final gauge:

[Window00]
.....
gauge00=Captain_Sim.x777.sys!main, 0,0, 1,1
gauge01=Captain_Sim.x777.sound!main, 0,0,1,1,Captain_Sim\777\sound.ini
//gauge02=Captain_Sim.x777.update!Main, 0, 0,  3, 3[/b]
gauge02=Captain_Sim.x777.wxr!main,1,1,1,1 <- make this gauge02 to replace the commented out gauge02 update gauge!

It may still work without there being a gauge02, but I haven't checked this.