Act! database still listed in Act! Diagnostics even though it was deleted from the computer

Symptom: I have deleted a database from my computer, but in Act! Diagnostics the database name is still shown in the Database List.
 
Product Details: 
Product Family: Act!
Product: Act! Pro, Act! Premium
Version: v19 and later
 

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Cause:
The cause is not currently known.
  
Solution:

1. Close Act! Diagnostics
2. Press the Windows key + R on your keyboard to bring up the Run dialog
3. In the Run dialog, type cmd, then press Enter
4. Type sqlcmd -E -S localhost\act7, then press Enter
5. Type drop database [database name], then press Enter
   
   Note: Replace [database name] with the name of your database without the brackets
    
6. Type go, then press Enter
7. Once confirmation of completion appears, close out of the Command Prompt
8. Open Act! Diagnostics and verify that the database is no longer listed