You could solve this by removing the Office and Adobe Reader button and replace them with a button Apps or removing them all together as you have stated that you wanted this app to be more then a PDF to Docx converter. Don't forget to add the "Convert to..." option in the context menu, maybe you could expand this like : txt, xml, doc (Word 2003). I've noticed you can't navigate a folder up in the public folder, this needs to be fixed as well if you want this app to become a WP8 (File) Explorer (= my suggestion for a name).