Serenity for Android 1.7.4b
Just pushed to the Google Play store as well as Amazon App Store (that should hit in a few days). This is primarily a bug fix, and contains the ability for the MENU key to bring up the HUD/OSD when playing a video with the internal player on the Fire TV. It should work as well on any device with a MENU key on the remote control.
Let me know of any issues.