The Main Form appears when starting Project Clock Client/Server and it has several controls and also a menu. 

On the Data Manager screen you can view and edit of all Project Clock data. To get to this screen go to View and Data Manager on the main menu. 

This is the Hours Entry form which lets you enter blocks of time. This is accesible by choosing Clock and Add Hours from the main menu 

By using the Project Management features of Project Clock you can keep track of the project's estimated and actual costs and completion times. This is available when clicking View and Data Manager on the main menu.