The project owner or master user can designate a project as protected, in which case no user can delete or modify the project, including the project owner or master user: the project is read-only, until the project owner or master user turns protection off.
Turn on protection by selecting the project in the Repository pane and choosing 
               		Project > Toggle Protection. Choose 
               		Project > Toggle Protection again to turn it off. Look for a symbol like this one 
               		 to indicate that a project is protected.
 to indicate that a project is protected.