Having the same problem with my 640 (10586.318). I have five different NFC apps on my phone, and I can't use any of them to launch specific apps. Some apps launch, but other like Alarms, Photos or OneNote don't do anything. My guess is because they're new W10m apps, and the W10m apps have all new and different appIDs.
All of the NFC apps that I use (NFC interactor, NFC Commander, NFC toolkit, NFC Launchit, etc.) all look and still function like they're designed for WP8.1. Guess we just gotta wait for a proper W10m NFC programming app.