Ok, I finally got around to testing BitTorrent Sync. First of all, I upgraded to version 1.4.103-9 via SynoCommunity in the Package Center and it took care of the missing icon. I then installed BitTorrent Sync on my phone and tablet, it didn't sync at first. I was getting an error that I had no permission to write to the folder(s) on my DS214Play. To fix this, go to Control Panel > Group > users > Permissions (tab) and check mark Read/Write access on your chosen shared folder(s). I have yet to sync with my PC and Laptop. If any issues arise, I will be back posting.