Creating script file

This is the suggested location for scripts, according to the manual: ~/Library/Scripts/Applications/EagleFiler/

My Library doesn’t have a Scripts folder (but does have an Application Scripts folder).

How do I create a new folder in the library named Scripts? (Dragging and dropping not working, nor is trying to right click in an empty space–maybe because of Library’s “hidden” nature.)

Or would Application Scripts work?

You can either open the Library folder and then create the Scripts folder, or you can go to the system Script menu and choose “Open Scripts Folder ‣ Open EagleFiler Scripts Folder” and it will create all three folders for you inside of Library.

No, that is for scripts that applications run outside of their sandbox (e.g. for Mail rules). The Script menu uses the Scripts folder.