Chrome (Windows or Mac) has its own proprietary Flash Player plugin, called "PepperFlash". If you go to: [user]/Library/Application Support/Google/Chrome you'll find the PepperFlash folder. You need to hold the "Option" key when you click "Go" from the Finder menu to access your [user] Library folder. Trash it and empty the trash. Relaunch Chrome and it should either rebuild the plugin or prompt you to update, and it will replace it.
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