Hi Caitlin, unfortunately I don't know if there are any better ways of archiving folders as you're asking. Any chance that they're in a parent folder that can be archived?
You can also right click on the Program to archive it. Best to use an overall Archive folder.
To add to Josh's comment, a good best practice is to have one main Archive folder that all of your archive programs rest in. If you call the folder "zzArchive", it will go to the very bottom of your Marketing Activities tree. It's a good way to get archived programs out of the way.
Hope this helps!