I need to add "Edit" for .PPS and .PPSX files to the Context Menu. Until Office 2010 the Edit key was not on the registry for the PowerPoint.SlideShow. entry, so I just added one, it appeared on the context menu when right clicking on one of those files and the problem was solved. For 2010 the Edit key is already there, so there is nothing to add, but it does not show up on the context menu. Searching, I found a way to add an Edit key on the context menu, but as it is added at HKEY_CLASSES_ROOT\*\shell\customEditPPSX, it appears on ALL context menus, not only for .PPS and .PPSX files, and this is inconvenient because there is a permanent Edit position, often a second one when another already exists for other files. If the registry already contains an Edit key for that files and it does not appear on the menu, there is no point trying to modify it. How can I solve this, please.