By default, Report Writer reports get saved to the Custom Reports root folder. If you no longer see any of your saved reports,this usually means that the view has been changed to one of the sub folders under Custom Reports, such as My Reports or Shared.  Follow the instructions below to see all of your reports:
  1.  Data Management>Reports
  2. Click Report Writer
  3. From the left navigation bar, click Custom Reports
All reports should now display.