Check HERE to see your current Flash Player version, as well as the latest revision available.
Alternately, while logged-in, right-clicking your mouse in any Flash window, i.e. the "Play Now" window (on the left side of your screen), or while on the game screen, will bring-up "About Adobe Flash Player XX" (usually the bottom item in the list). Clicking that item will also take you to the link provided above.
Instructions for updating your revision are there, if you see that your player's revision number is out-dated.
It's a very quick process... no "uninstallations" or "restarts" are necessary. It usually takes less than a minute to accomplish. ***SEE EDIT ABOUT "MAJOR VERSION CHANGES".
***EDIT: UPGRADING FROM 10.0 VERSIONS OF FLASH TO 10.1 VERSIONS (or "rolling-back" to 10.0 versions) NECESSITATES FIRST UNINSTALLING THE PREVIOUS VERSION, AND THEN RESTARTING ONE'S SYSTEM.***
It's important that we keep-up with the upgraded revisions. They not only contain enhancements to make the gameplay better, they often contain updated security features.
Good Luck,
- PugsAce