526
Notepad++ Hijacked by State-Sponsored Hackers
(notepad-plus-plus.org)
This is a most excellent place for technology news and articles.
Yes, that's the safe way. Uninstall, download current version, install. That's it.
Outside of being compromised already where you would have to notice and fix outside of notepad anyway. But that seems unlikely given the selective attack nature the hoster was able to confirm. If you'd want to cover that you would have to know and do a lot more.