Well yes it is possible to run it without ashDisp.exe
But only in case you have set Silent mode for Standard Shield before.
This way malware will be automatically placed into Chest,but you won’t get any warnings.
If you want to remove it just because you don’t want to see the tray icon,then i suggest that you use my avast! External Control (AEC) tool from www.excessive-sofware.tk
You can find Hide tray icon function under avast! Tweaker option when you run AEC.