Install and Test at least 2 different 3D Applications

I downloaded free non-commercial version of Fusion and Blender. I was able to open the .stl file in both software programs.

※It took almost 15min to download and setup Fusion.

I imported the Pocket PCR Case from Urs in 3D applications.
In blender, STL software opened when I selected “import” instead of “open”.

There are too many features. I am not sure which mark is what function.
↑Fusion

↑Blender. For me, this one is a little easier to handle than Fusion.

When I tried to manipulate something in blender, I got this error.

By the way: for TouchDesigner, .stl files were not supported.
I changed .stl to .fbx and was able to import.