Hello Shelly, and welcome to Seven Forums.
I know this is silly, but did you use the Enable (step 1) REG file download? Have to ask.
I notice that you are using Enterprise. If you are part of a domain, then they may have policies in place preventing context menu additions.
Do you have the registry key at the location below added from the REG file? You'll have to scroll past the first set of file extensions.
Code:
HKEY_CLASSES_ROOT\Folder\ShellEx\ContextMenuHandlers\{a2a9545d-a0c2-42b4-9708-a0b2badd77c8}