Flash Player 27.0.0.130 goes around and around, repeating install endlessly.

I am using FF 55.0.3 which is the latest. When I try to use something that requires the Flash Player (Google Finance stock charts), I am prompted to enable the Flash Player. When I do I get the D/L page for an update to the Flash Player (27.0.0.130). I go through the process, it completes and congratulates me but when I then restart my browser and re-try web-page, the Flash Player update process repeats (need to enable, takes me to the update page for 27.0.0.130, install it again, then it repeats). I have been through this at least 3 times and nothing every changes even though the update succeeds, each time.

Help!  I am in Flash Player Update Hell.  Jane, how do I stop this crazy thing?

All I wanted was a stable Flash Player update which would finally correct the horrible problem the Flash Player has had for years where it constantly crashes and burns on just about every web-page it is called up from.  Huge, long freeze-ups followed by a message from the Flash Player that it has stopped working, again and again and again and again ...

Chuck.