Hi,
harmony can't break your game.
Harmony is a libary for other mods and do nothing to the game itself.
That why noone else report such an issue.
Reinstall the mod, did you just copy over the new version or did you delete the old mod folder too ?
When you installed it manualy, be sure you copied it correct, and don't have a wrong file structure like double mod folders.
Maybe start from scratch, disable all mods (or just delete the modconfig.xml) just have the core and DLCs active.
Then add harmony (before Core).
And when there are no errors add other mods.