sping115116:

方法好用，但是这里有一点补充下，不用卸载重新装，修改下

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{57FA2D12-D22D-490A-805A-5CB48E84F12A}\InProcServer32]

@="C:\\Program Files\\Beyond Compare 4\\BCShellEx64.dll"

"ThreadingModel"="Apartment"

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{57FA2D12-D22D-490A-805A-5CB48E84F12A}]

@="CirrusShellEx"

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{57FA2D12-D22D-490A-805A-5CB48E84F12A}\InProcServer32]

@="C:\\Program Files\\Beyond Compare 4\\BCShellEx.dll"

"ThreadingModel"="Apartment"

这两个路径就行