Steps

Go to the Projects page by clicking on the ‘Briefcase’ icon in the left menu or by going to the following URL: or in your Folders

Choose a project by clicking on its name to open it

Browse folders to go to the relevant folder

Right click on the file

Choose ‘Cut’

Browse folders to go to the destination folder

Right click

Choose 'Paste'

or

Select file

Drag the file to another folder

Information

If a file is moved to another tree level, the original members of the containing folder will no longer have access and the members of the destination parent folder will have access to it.