Ok, you have the file called agentswitcherplus.7z somewhere on your computer, right? Find it, copy it to K-Meleon root folder, it is where the browser install, usually C:/Program Files/K-Meleon. Now extract/unzip (I don't know the exact name, because english is a foreign language to me) by mouse right-click agentswitcherplus.7z (I assume you've got some proper software like i.e. 7-zip).
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