Unable to use fiction-dl, pops out an error

[Xanthraxxx]

f-dl : The term 'f-dl' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again. At line:1 char:1

• f-dl https://www.fanfiction.net/s/14220835/1/Uzumaki-Shinigami (this is a test url)

• 
  + CategoryInfo          : ObjectNotFound: (f-dl:String) [], CommandNotFoundException
  + FullyQualifiedErrorId : CommandNotFoundException

I did everything which includes upgrading and just errors out on any link provided from other sites. Nifty.Org does not work either.

Isn't there supposed to be a f-dl exe file included with this?

[Xanthraxxx]

'f-dl' is not recognized as an internal or external command, operable program or batch file.