Sherry

I have several computers synced via Resilio Sync. Today, another program deleted all the files in my synced folder, about 200GB worth when I wasn't connected to the internet. I have unsynced this folder and stopped syncing and internet access to it for now. I'm restoring the files manually via a USB drive. How can I stop the mass deletions from spreading to my other computers? I've deleted the history and unlinked the folder for now. Thank you.