No your save is not broken you just need to keep doing all quest and the 4th move and wait till mom takes Max to the clinic and keep doing all quest and going to the clinic until Eve tells Max to bring his GF next visit and that will start v.12 content.
Its a mod that allows cheats through Max's laptop but there really is no reason to use it because it can break your game if used to soon, you can cheat a little bit of money to help buy the clothes for the girls but anything after that is not needed.
If you want to try it here it is but remember you can only use 1 mod at a time unless you know how to combine mods.
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It also has the homework bug fix included in it if needed.