I would need to know what was used for a finish. Can you contact the person who did the finish for you and find out what he/she used?
In most cases, you can lightly sand with fine sandpaper (220) and carefully remove all dust and dirt and reapply a coat of a finish that doesn't have as much shine. The best your going to get for a floor finish is probably going to be a Semi-Gloss. McCluskey makes a floor finish that is relitivly easy to use called "GymSeal". One thing you should be aware of is that the higher the gloss, the better the wear and resistance to scuffing and staining.
The thing I'm concerned about is compatibility. If your contractor used a two part water borne epoxy, then you may have trouble getting an alkyd floor urethane or varnish like GymSeal to bond to it.