Doh! I bought it on 22nd May in order to get the upgrade discount - I only went to use it yesterday which is when I found out it's not compatible with DW8 :-(
You say the reason for this is becasue you no longer test on DW8 - is there anyway of getting a version of the MXP which will install on DW8 - I understand it will not be supported, but I'd rather have a go than pay $343 MORE than US Adobe customers pay to upgrade from Studio 8 to CS 4 Web Standard. (US price: $399, Cyprus - Europe price: €527 euros excl. Tax) It is so unfair :(