used DCC for a year or so on a self installed Spectrum Russian Decapod with speaker install;

i was really proud it worked great!!! until I let my son (3) and nephew (4) alone for 30 seconds last Christmas with my layout;

nothing was off track etc, but i estimate that the little guys decided to press some buttons randomly on the EZ command.
now - it just doesn't run. I want to just reset all CV's to factory default on the ....the soundtraxx dsd- lc  manual states " program cv 30 to 2" to reset cv's to factory default.....what do i do? I have never programmed a CV and the EZ command manual doesn't give me any information