Click 'Projects' in the upper navigation
Click 'Project Archive'
Select 'Deleted' in the 'Active/Complete/Deleted' dropdown
Fill in any other search criteria
Click Search
Click the 'Restore' link to the right of the Project
Click 'Restore'

Click 'Projects' in the upper navigation
Click 'Project Archive'
Select 'Deleted' in the 'Active/Complete/Deleted' dropdown
Fill in any other search criteria
Click Search
Click the 'Restore' link to the right of the Project
Click 'Restore'