The peers never displayed each other in Devices tab. I had read somewhere that a user thought the tab was just for mobile devices, and took their word for it. I ended up waiting a few days and tried to tackle this problem again. I discovered that the client would not show any updates available, but an update was on the site. I downloaded and installed the update on both pcs, and the history, transfers and devices tabs all began working as expected. On the other hand, after several weeks free of crashes, it appears I've run into a problem where several files newer than a certain date have gone missing. I've looked in the .syncarchive, and restored the files there, but there still appears to be directories that are simply gone. How can I determine what caused this? I believe I had the debugging logging turned on, but I'm not sure where to find those logs.