Remove Numbers ,special characters in a file using Notepad++

Replacing numbers with empty space

1)Ctrl+F 

 2)  Replace - Search mode: regular expression

 3)  Find What: [0-9]+

  4)Replace With:   (// Replace with is empty)

Replacing words with empty space or other words

1)Ctrl+F 

 2)  Replace - Search mode: regular expression

 3)  Find What:  Good morning

  4)Replace With:   Good night

Replacing special characters with empty space 

1)Ctrl+F 

 2)  Replace - Search mode: regular expression

 3)  Find What:  ;

  4)Replace With:   (empty )

Replacing  2 newlines (\n\n)  with 1 newline(\n) 

1)Ctrl+F 

 2)  Replace - Search mode: Extended(\n,\r,\t)

 3)  Find What: \n\n

  4)Replace With: \n