Ahh, thanks for that suggestion, have had that issue with other things like WAMP.
Reinstalled to /wxwidgets, changed base value in Global Variable Editor.
No joy
But then again, there is no wx directroy in the base wswidget install directory, maybe it digs deeper. There are /lib/gcc_dll/wx/ and others under /lib/ but none of them have /wx/msw/wx.rc (or any rc files) anyway.
Frustrating.