Save the following as Add_DOpus_RightClick.reg:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\*\shell\OpenWithDOpus]
@="Open with Directory Opus"
"Icon"="C:\\Program Files\\GPSoftware\\Directory Opus\\dopus.exe"
[HKEY_CLASSES_ROOT\*\shell\OpenWithDOpus\command]
@="\"C:\\Program Files\\GPSoftware\\Directory Opus\\dopusrt.exe\" /open \"%1\""
[HKEY_CLASSES_ROOT\Directory\shell\OpenWithDOpus]
@="Open with Directory Opus"
"Icon"="C:\\Program Files\\GPSoftware\\Directory Opus\\dopus.exe"
[HKEY_CLASSES_ROOT\Directory\shell\OpenWithDOpus\command]
@="\"C:\\Program Files\\GPSoftware\\Directory Opus\\dopusrt.exe\" /open \"%1\""
Remove_DOpus_RightClick.reg:
Windows Registry Editor Version 5.00
[-HKEY_CLASSES_ROOT\*\shell\OpenWithDOpus]
[-HKEY_CLASSES_ROOT\Directory\shell\OpenWithDOpus]
Or AutoHotkey script (hotkey):
File Managers Redirection