Installed Adobe, does not appear in browser - Opera

[moderator: added browser to title]

So I was trying to play this game (Town of Salem) then it said "To play Town Of Salem please install Adobe Flash Player version 11.4.0 or greater." I thought, I already have adobe flash player, so I reinstalled adobe flash player, i restarted my browser (Opera) and went back to the site, it didn't work again, it said the same thing "To play Town Of Salem please install Adobe Flash Player version 11.4.0 or greater.". Does anyone know how to fix this?