Try contacting Kinetico by email at email@example.com or call them at 1-800-944-9283.
If as you say the salt in now depleted you will need to add salt to the brine tank. You can first clean the brine tank by taking out all the dirty water and flushing out the tank with water with some household bleach. Your water smells and tastes terrible probably due to it not being soft.
It is usually a good idea to clean the brine tank at least every other year. I would not adjust anything on the control without the assistance of a Kinetico Dealer or from Kinetico themselves.