uscutters mh refine and eu_refine mh are the same.
uk model has laser pointer on carrier and if you have signgo full version then by chosing eu refine mh 721 871 or 1351 you are able to do comtourcut.
you can download free trail for one month full version signgo from their site.
http://www.signgo.com/download/index.html
just chosr eu refine as a driver
your uk seller has original usb full signgo for 75gbp if you bought plotter from them.
http://cgi.ebay.co.uk/castop-plus-signgo-full-version-print-cut-sign-softwar_W0QQitemZ270437794750QQcmdZViewItemQQptZLH_DefaultDomain_3?hash=item3ef75943be&_trksid=p3911.c0.m14
http://cgi.ebay.co.uk/EU-REFINE-721-VINYL-CUTTER-PLOTTER-W-LASER-OPTICAL-EYE_W0QQitemZ280389702055QQcmdZViewItemQQptZLH_DefaultDomain_3?hash=item41488751a7&_trksid=p3286.c0.m14