After updating the OS to kitkat 4.4.2 in Glass, the application I am installing using glassware or via usb debugging are not visible in "OK Glass" -> Immersion. Even on the glass time-line the installed app via glassware are shown as facebook 2min ago, twitter 10min ago but when I was trying to access them using "Ok Glass" command they are not visible in the list of apps.
The same problem with my GDK app was fixed by adding
<uses-permission
android:name="com.google.android.glass.permission.DEVELOPMENT" />
to the manifest. This is new for XE16, but the change isn't well documented IMHO.