Applications show as .app instead of  in Alfred & Spotlight I do not know the actual time or date of the change, but I noticed it today. 

Example: I use Alfred which now shows "Word.app" instead of "Word".

Same goes for Spotlight.

EDIT: How do I remove the .app for my applications?
Maybe your Finder's (advanced) preferences is set to &quot;Show all filename extensions&quot; - I like that, actually!
So you would uncheck this box to hide the .app extension.