[KCMike]

 Here is some pics of an old one I have. I took pic. of it and looked like yours with shiny end of vane.
https://www.dropbox.com/s/j95dsbq1n6scy1...8.JPG?dl=0
  I figured nothing to lose and decided to see if I could remove it.
https://www.dropbox.com/s/9mxb0to3lcnsm2...9.JPG?dl=0
 After carefully bending back the four tabs on the back I pulled it apart.
https://www.dropbox.com/s/zmqylmrb6lqxj1...1.JPG?dl=0
 Here is what it looks like after removal.
https://www.dropbox.com/s/10gb5ucm2l6enk...4.JPG?dl=0

https://www.dropbox.com/s/ybqic8wtckup01...2.JPG?dl=0

https://www.dropbox.com/s/exvbyk2ewd21na...3.JPG?dl=0

 You might want to try this to get a better look at yours. If you do don't get mad at me if it breaks   Good luck.