HELP! I need to convert .S3D to .STL

[curious aardvark]

Right - given how easy this kind of thing is to do in a modelling program, that does seem overly complicated.
Also it insisted on installing apple bonjour on my computer - which is annoying.

I'll have a look at the 3d software - and then go tell you to learn openscad :-)

Yep pretty much as expected - it's a non-convertible proprietary format.

It's shame their printer is so limited.
The way you can add text to things in the slicer would be really useful.
But alas - you'll just have to learn to do things the hard way like the rest of us :-)