Swift One,
I have the same compliant with the iFinder Hunt and the MapCreate 6 software. Only a few months after I purchased the Hunt, Lowrance came out with the HuntC and the MapCreate 7 software. I called to see if there would be an upgrade for the Hunt so I could use the MC7, but was told that there would be no upgrades since they no longer offered the Hunt, only the HuntC. Therefore, I would have to buy a new HuntC in order to get any more mapping upgrades.
If you find any other mapping software that will work with the Lowrance units, PM me, please.