Thanks
"Not very well documented at all." <- understatement of the year!
The bottom of the screen is too high for the options boxes, and when I drag the bottom of the window down, the box readjusts itself lower so it's still not fully on view
This is exactly the same as with JOSM (and one of the reasons I can't set my options in it).
Might this be to do with my java settings? and if yes, how can I mend them?