Reply to Resilio Sync seems to have stopped syncing new files?

Helen
By Helen,
I've merged the two posts. 

Well, actually there might be a lot of causes for this problem, and to tell you why files don't sync in your particular case, we need to know your particular case, environment, peers, etc. 
Meanwhile, you can use this guide to troubleshoot, and if tips from there do not help, contact support and give the details about your setup.