I can't update as you know, so installing the full package gets above error. I think Launcher is in a joomla install already no? I can't use that on my site.
Thanks for getting back to us your issue resolved.
Just for your information, I have locked and marked this thread as resolved to avoid confusions in the future. Please start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiries.