I accidentally marked a shared folder as "Available Offline" in Windows Explorer on Windows 8.1 computer. This seems to have "woken up" the Sync Center and caused the Sync Center icon to be displayed in the system notification area. Even though I've undid that by marking the folder as not available offline, and furthermore have reset CSC and disabled Offline Files, the Sync Center icon still appears in the overflow section of the system notification area.

How do I remove the Sync Center icon and preferably disable the process that is displaying it?

Debugging info: The registry shows that stuff is enabled, even though the Sync Center and Offline Files dialog don't indicate that anything is active.

HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\SyncMgr\HandlerInstances\{750FDF10-2A26-11D1-A3EA-080036587F03}
    SyncTime    REG_BINARY    F6DDC46CBB76CF01
    Connected    REG_DWORD    0x1
    Enabled    REG_DWORD    0x0
    Active    REG_DWORD    0x1
    NotifiedOnFirstActivation    REG_DWORD    0x0

HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\SyncMgr\HandlerInstances\{750FDF10-2A26-11D1-A3EA-080036587F03}\SyncItems

HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\SyncMgr\HandlerInstances\{750FDF10-2A26-11D1-A3EA-080036587F03}\SyncItems\{CBA95344-4284-48CB-8083-3BDE1FDB29A7}
    SyncTime    REG_BINARY    F6DDC46CBB76CF01
    Connected    REG_DWORD    0x1
    Enabled    REG_DWORD    0x1