Hi @Chrisir good to know someone is still using Shapes3D as it was first released 17 years ago and the latest version V3.0 was 6 years ago. It has been so long since I used it I thought I better try it out in Processing 4.5.6 and I am pleased to say all the library examples worked just fine: 
Which version are we talking about? Version 3 was a complete redesign / rewrite of the library which will make it difficult to convert sketches using V2
There is no such method called pickShapeB in the library hence the error message.
The import order should not make a difference but the order you report is the one used by Processing when adding the library to a sketch.
As regard to the torroid code I assume you it is the same code I posted in this discussion
I just copied the code into 4.5.6 and it worked fine for me.
If you are having problems with picking then check out the library examples and if they work for you it must be something in your code.
Let me know how you get on. 
setSize is not a method in V3 must have been in an earlier version.
Regards
quark