Morning. Right, for thorough clear they suggest Lithofin KF cement residue remover (it obviously removes more than cement), for protecting the tiles Lithofin KF stain stop, for enhancing the tiles Lithofin KF tile polish and, for regular maintenance Lithofin easy care.
Have a Google, if you have already got them clean you probably wouldn't need the first one and I wouldn't bother with the last one either. Perhaps just the stain stop and the tile polish to get them looking their best.
Lithofin do have a good customer services department who sour help you - tel 01962 732126