Hi Gavin, very cool, I'm glad that it has enough stuff to work for you now!

> (export button does not work, save as .stl does)

The export is for saving only the selected objects to a file. This can be confusing, because if you don't have anything selected, it will prompt you to select objects, but the prompt is all the way on the other corner of the application so it is sort of hard to see what is going on.

I'm sure that you'll have questions as you start to use it more, please post them here.

- Michael