move index.html file to upper folder

Deploying a Rise course on Thinkific requires uploading a zip file as multimedia content. However, the index.html file is in a subfolder so it needs to be moved to the upper folder level for Thinkific to recognize the zip file for launching. I need to do this to a large number of Rise file projects. What is the best way to do this to a large number of projects, or do I have to just do it one at a time?