First of all, don’t worry as this process will not delete your progress. As soon as you reinstall the game you will be back on the same level as before.
In order to delete the game from Facebook please follow these steps:
Go to “Settings => Apps” and press the “x” next to the game app.
Now clear the cache for your computer: http://www.wikihow.com/Clear-Your-Browser's-Cache.
Search for the game on Facebook and start playing.
Hope this helps
Remember to connect the game app to Facebook so it can sync and keep in mind lives and Boosters do not get synced.
Hope that helps
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