I had a process that started adding hundreds of thousands of files to a directory which was just over loading the sync process on my machine. In an effort to solve this issue I moved the directory which had the files off to another drive outside of the synch folder. Now those files are stuck in my progress queue and nothing is happening. No files since I moved that directory off either those that moved or other files in other directory have synced on this system since. My other system is just fine, new files sync to it and the directory that I removed is no longer there.
InSync 1.4.9
MacOS 10.11.6
The folder does not appear in this view that I can unsync the folder either.