I am not sure if this is a win 8 issue or stroke it issue.
1. whenever stroke it is running it sits in the task bar+ system tray
2. exit from the task bar, the app closes and exists from tray
3. The behaviour was stroke it sitting only in system tray. this was good. it does not happen in windows 8
4. the app icon needs an update
Also this is on windows 8 Consumer preview (64bit), running on intel i5