Pasted from the release notes for Notepad++ 6.1.4
which may give you pause for thought....
1. Fix a crash issue of Windows 8's Computer Manager due to Notepad++'s Shell Extension (Explorer's context menu).
It's been the case that a new release of Windows has shown that Microsoft have changed something at the heart of the Context Menu that affects apps with Shell Extensions. Fore-warned is fore-armed.