I INSTALLED NEW SLIDERS BUT SOME OF THEM DON’T WORK!.Sliders don’t need to be updated, however, it’s possible some might be updated by the creator if they are not working right or are in conflict with other sliders.
No, they don’t, but they might conflict with other sliders. Similar to mods, Sliders cannot be converted to sims3pack, therefore the only way to install them is to place them in your MODS folder.