Is There an Archive Function to Manage Old Gamma Projects Without Deleting Them?

Good news: My team is using Gamma like crazy. Bad news: My team is using Gamma like crazy. That means we’ve got dozens of Gammas for old project in folders just moldering away in that left panel. Is there any archive function? I don’t want to delete completely, because you never know when you might need something — or when a former client becomes a current client.