I keep my Flash Player set to "Never check for updates" because there are so many "fakes" out there.
You can always check the version by right clicking ANY flash content. You'll see teh version in the last line of the contextual menu.
I always use the installers here:
If and when you see something telling you to update, simply use the links again.
If you still see update notices after you've updated, they're "fakes". Disregard them.