The problem appears to be it won't run on IE11 windows 8.1 64 bit. and its a combined 64 and 32 bit process so can't swap between and 8.1 won't run IE10
Changing enhanced protection mode makes no real difference (a way of getting 32 bit machines to work as 64 bit). It gets a bit further by wanting to download the charts, but then says this is not allowed under enhanced protection mode so gets no further.
So it appears I am stuffed unless skydemon can make it run on 64 bit