Open Windows Explorer, and navigate to:
C:\...\Ghost Recon\options.xml
tried looking in win explorer like u suggested. opened all the folders and couldn't find options.xml. I'm not a programmer and am pretty dumb when it comes to all that. i'll tell u what i did.
start>my computer>local drive>program files>ubisoft>ghost recon advanced warfighter>??
bunch of dll files, Bundles, local, tools, etc.
i just haven't learned any of this yet, sorry.