I have not been using S3D For a Crazy Long time, But There are Certain Items In the Process Sheet that are Global Variables and should be Tied to The Material used.
Forexample:
In the Other Tab - Filament Diameter, Price and Density are all Tied to the Printer Profile Selected and Should be Tied to Material Selected.
It would be Nice to have a Separate Window Pop up to add New and Modify Material Profiles or Import/Export Filament Profiles