Please open FBackup, go to File->Options.
In my case the app will not start.
In the past this issue has cured itself but not so far. A dialog box recommending a new version of FBackup popped up.
Now, after rebooting and opening FBackup again, a new dialog box pops up saying "FBackup has stopped working." Microsoft is looking for a solution and will notify me.
Then the IPC error popped up again. After closing the app, surprisingly Btray.exe is in the list of processes but consuming no CPU cycles.
It seems that as soon as I think I understand what is going on ... something changes. Now FBackup started when the icon was selected. It asked to install the newest version (230) which I selected. I then did a manual backup (even though the daily mirror ran with errors) to delete my "trash" files that had been backed up earlier while Audacity was running. The backup completed with the same four warnings as usual; i.e. --
[11/6/2013 4:16:41 PM] Warning: Skipping file C:\Users\Others\AppData\Roaming\Microsoft\Windows\libraries\Documents.library-ms
Source error (code 5). Access is denied. (C:\Users\Others\AppData\Roaming\Microsoft\Windows\libraries\Documents.library-ms).
[11/6/2013 4:16:41 PM] Warning: Skipping file C:\Users\Others\AppData\Roaming\Microsoft\Windows\libraries\Music.library-ms
Source error (code 5). Access is denied. (C:\Users\Others\AppData\Roaming\Microsoft\Windows\libraries\Music.library-ms).
[11/6/2013 4:16:41 PM] Warning: Skipping file C:\Users\Others\AppData\Roaming\Microsoft\Windows\libraries\Pictures.library-ms
Source error (code 5). Access is denied. (C:\Users\Others\AppData\Roaming\Microsoft\Windows\libraries\Pictures.library-ms).
[11/6/2013 4:16:41 PM] Warning: Skipping file C:\Users\Others\AppData\Roaming\Microsoft\Windows\libraries\Videos.library-ms
Source error (code 5). Access is denied. (C:\Users\Others\AppData\Roaming\Microsoft\Windows\libraries\Videos.library-ms).
I then unchecked the tray option and installed the update to 230. At this point the new version is running, btray.exe is in the process list (even though the tray option is unchecked) but is taking no cycles. I guess that is progress. Should I end the process manually and then see if it is restored with the start up of the FBackup app?