I actually have a copy of the MapSend DirectRoute software for U.S. and Canada (metro areas) that I am not using. I gave the Magellan Meridian Platinum unit I had to a friend of mine in Europe, and the North America maps were not much use to him.
I assume that it would work on an eXplorist unit. I bought the software a few years ago, before the eXplorist units were out, so it's not listed on the package as one of the units it supports.
I could sell you my copy for $50 or so. I paid about $100 for it originally. And, of course, if it didn't work for that unit, you could certainly return it to me for a full refund. Let me know if you're interested.