Ok I am going to give you a couple of things to try. Please let me know before you attempt these if you do not understand or are not comfortable performing them and if you prefer I can do a remote support session with you and connect to your computer and fix it for you.
Open the Chrome Plugins page by typing this URL into the address bar: chrome://plugins
Find the "[+] Details" button in the upper right to show the details of each installed plugin and click this button.
Find the Flash Plugin Section in the list of Plugins. There may be (1 file), (2 files) or (3 files) in this section.
In the Flash section there should be 2 or 3 different versions of Flash listed.
The first Plugin listed in the Flash section is the PepperFlash implementation. You can tell that the first one is PepperFlash by looking for "PepperFlash" in the Location string. See yellow highlight below.
Find the "Disable" link and click that link.
Now Close all open Chrome windows and tabs and restart Chrome and it should work.
If you need further help please let me know.