The root can be set inside the project method SVR_GET_DatabaseRoot. The method has the "execute on server" property checked so it is ran on the server. This method just returns the server root, but you can change it to a different location. You can move it out of the resources folder, or hard code the directory you want to have as the root.

The documentation should include instructions to make the code and forms useable in C/S mode. As it's presented, the "Root" folder is located in the Resources folder. The code that sets the path to the Root folder uses Get 4D folder (Current resources folder), which will return the path to the user's Resources folder. Placing the Root folder there means that any files uploaded will actually be located on the user's computer, not the server, so they wouldn't be available to other users. Also, at the next startup all files would be deleted when the Resources folder is updated from 4D Server. Unless I'm missing something, the Root folder should be placed elsewhere, and it would be up to the developer to provide the full path to it, since I don't believe there's a command that will return the path to the Server 4D Folder.