Closing and Minimizing Write
It would be great if I could just close Write when clicking on the Closing X button. I don't really need it running in the background all the time. Otherwise, I feel like I'm using Skype (which is a fastidious pain to close).
About minimizing the application: Instead of just minimizing it to Apps bar, you could add a settings option, so the user can choose where it would be minimized: to the app bar or to the tray bar. MusicBee works like this and it's pretty great :)