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"How do I remove unwanted options that appear on right-click menus after installing software?"
Usually, all that is required is to remove the appropriate key under the shellex\ContextMenuHandlers key in HKEY_CLASSES_ROOT for file type "*".
Now here's the link to the info on the site I found using google (I hope this is okay!): fix right click menu [jfitz.com]
I HIGHLY recommend you read the whole article THOROUGHLY!