hmmm, yeah i had a feeling you were on 6.1. however i remember the setting being in the stock rom as well, as i used that for some time too. its gotta be there in the settings, just check through everything...annoying but its the only way unless someone else can give direction.
also, titanium is only for 6.5. and if you do want to run it, pm me and i can send you a cab for a Home Screen Customizer program that really makes titanium useful, before using that program it didn't suit my needs. it adds a weather panel, and a fav apps panel. you can also organize and delete ones you do not like
if you are unaware of what you are in for, heres what titanium can due for you:
