Over-the-air update now rolling out
Hot on the heels of the open-source code drop, the Google Play edition HTC One has started receiving its over-the-air update to the latest version of Android, 4.4 KitKat. The 320MB update is arriving automatically on some handsets today — though as usual, not everyone will receive the update right away. As is the case with other non-Nexus 5 devices, the update includes the older stock Android launcher as opposed to the new one with Google Now integrated.
If you want to sideload the update, we've got the download link after the break.
Note: On the Google Play edition HTC One you can download the update directly to local storage, then use the "update from phone storage" in the stock recovery to flash your update.
Alternatively, use the method for manually updating Nexus devices.
OTA link via XDA