Hello shirsch,
I have a couple different types of these emulators and was looking for the same software as well. I had the software several years ago and used the units with great success, then lost it in a hdd crash. If you didn't know these were apparently made by a couple of different companies, B&C and MSD, both under the Romem name. MSD kept their website up for support for a few years after they closed up shop, and you could download the software. That finally closed years back, but you can still see the site on archive.org (www.romem.com) Anyway, I was searching today for the software and found a link to the roll up CD that MSD was providing. I downloaded it today, but I've no idea where my emulators are at the moment so I can't test. They look OK, but use at your own risk. I'd post them here, but I don't see how at the moment. The link is: http://xdel.ru/downloads/romem/
If you can't/don't get to them, let me know and we'll get them to you somehow.