batman akrham asylum patch 1.1

anky

Youngling
hello friends..
i have been playing batman arkham asylum for a few days now...but there seemed a liitle problem in grapple at some points, so i downloaded the 1.1 patch..
but i dnt know how to install that patch..an error comes up saying batman arkham asylum was not found installed on your computer..
so how to install that patch..
thanks in advance..
 
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