Not too tech savy with tablets but need help

Question

My Nook HD+ uses Adobe Air, tablet says version is 3.3.  One of my games says it needs updated version of Adobe Air.  Go to Google play to d/l and it does and tries to install but I get an error message on tablet saying it "Already Exists."   Tried uninstalling the game app and reinstalling, shutting off tablet, etc., cleared the cache for my Adobe Air in my app settings, not sure about "clearing data" if I should try that, what that will do, and was told not to "disable" the app. by B&N tech support as that would completely wipe it off my system.  I'm trying to avoid doing a factory reset of my tablet.  B&N tech also said it did update, because it says it already exists?? if so then why is it still showing older version, not 13, after shutting down tablet and turning on again.  Google Play tech support says Adobe Air should work, that it's compatible. Somebody? Anybody please help!! Miss my game (Mahjong Time) which worked great before this update request. 
Thanks in advance,

Answer 1

Launch iTunes on your computer, plug the phone in & on the "Summary Pane", select "Restore". This will restore the phone to factory settings with all of your son's stuff gone. You can now use it as an iPod touch. To do this REQUIRES the deactivated sim card be still installed in the phone.