Hide/Show Extension File on Windows 7

If you would like to show or hide your file extension on Windows 7, follow the instructions below

https://docs.google.com/document/d/e/2PACX-1vQABmtUS_1CH92K6_WXI6Ccwim1MbarCyWetqYAr1VYPwjPngE9UjRBJyJZbEHCfNlV5VC3KEavktHX/pub
 
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