I bought Checkmate early on; put in my Colorado chips for a starter. Then with a bright techie at my elboy tried to copy it to a zip disc; lost everything. Started over; now have my Deadwood and Colorado chips on the CDRom drive but will not use it for the rest of my collection. Too labor intensive and not flexible in terms of access. To be fair, the developer said two years ago that they were working on an upgrade but I have no info on that.