After the latest update during March, 2013, noticed a runtime error as follows

Runtime error 216 at 12FC4BE had something to do with the explorer http://support.microsoft.com/kb/259279

And from the Event Viewer, the error shows the faulting module name is ShellMenu.dll

Initially, tried to install but failed with several crashes

Faulting application name: Au_.exe, version: 1.1.4.8, time stamp: 0x4bc06cd3

Faulting module name: ShellMenu.dll, version: 1.0.4813.4096, time stamp: 0x51362963

Exception code: 0xc0000005

Fault offset: 0x00004fbe

Faulting process id: 0x1b50

Faulting application start time: 0x01ce24eceb5eee1c

Faulting application path: C:UserskitipanAppDataLocalTemp~nsu.tmpAu_.exe

Faulting module path: C:Program Files4SyncShellMenu.dll

Report Id: 2befc7ab-90e0-11e2-bba5-1c6f65d70e71

Had to install the app and then remove it successfully.