The software has two modes a simple mode and advanced.
Simple is bring in the part. Lets say it's a downloaded stl from something like thingiverse and it's got simple shapes. Rectangles, rads, holes, boss features etc. The simple mode will switch them to a solid and will give you proper cylinders and holes. The holes may be split in two surfaces, a little like what you get importing a stp file.
In advanced mode it works different. You can use the same principle as simple mode, but adjust the tolerances to change the reults.
There is also a surface to nurbs feature in there. You have an auto mode, which quads the mesh surface and then makes the quads a nurbs surface. This tends to result in a large file size as it's literally every single quad becomes a nurbs (or near enough)
Then there is a manual mode, where you can draw on the mesh a set of quad nurbs surfaces. Basically like a retopology task but it's nurbs that are produced. I use retopo software for scanned data surfaces then remodel in MOI3D.
This software is nice, and they have recently fetched the price down. They had a version 1 out years ago, they then went to Kickstarter and produced instep studio. It flopped, but I had some emails back and too with them and helped with a few items and got some more advice on things. A lot of the instructions are a little baffling especially if you don't really understand how the numbers of the algorithms work to recreate certain features.
They sadly had issues with sales, and of course few sales means less development and so it's become a little stagnant. The license server etc still works fine so they must still be doing ok, just not really well to develop it further. Perhaps something like 12 months or so of no updates, maybe longer actually.
For me the drawing nurbs on surfaces was a huge thing, it took a process out of my work load of doing it as a mesh first then changing it. You draw on the shapes and get the nurb surface out straight away. They did say they would like to split that into it's own software and rewrite it. Think they relied on other software sources to do the coding and then they implemented it how they needed to. So the autoquad remeshing it does uses Instant Meshes which is free open source software.
