I was wondering if it is at all possible to rotate around a point on the Z axis or mirror on the Z axis. I'm not very familiar with the program but have spent significant amount of time with it making half a hemisphere out of windows. Currently you could consider the hemi on its side and on the floor and hoped theres some trick in mirroring/rotating around a point to complete the hemisphere and then rotate as a group so it would be dome above where it is. Sorry for my extremely poor explanation, I hope i dont have to manually calculate and apply edits to 60+ new windows to complete the hemisphere and then convert roll/pitch/rotate around and then do the same for NSEW.
I know you can group the tiles you have as your half sphere and then copy them...but i wouldnt know how to move them without manualy changing it. There probably is a way but would have to spend more time playing with the editor.