To work with a saved project, you have to load the project file (.spr ending) of the desired project.
Select the menu item File ↦ load project.
Locate the project file (.spr ending) in the file selection dialog and click open.
Select the user with which you'd like to open the project.
Login to the database.
After the project has been created loaded, all menu items will be available in the Seismon GUI. If there already exist colletions in the project, the last used collection will be displayed.