Hi Geoff,
1) I believe this issue occurred in earlier versions of the plugin. I removed the form, but there was still a message box for cases where no valid selections were made. That’s been removed.
2) Adjusted the versioning. Hopefully it worked.
3) Implemented an internal conversion and tested it with circle, rectangle, arc, line, polyline, and spline. It worked, but rotating the rectangle breaks the algorithm. I’ve run into this issue before, and as far as I remember, the fix is simple — I just need to look it up in my files. But I’ll leave that for later.
Thanks a lot for the great feedback!