Ok, I will try the next update when it comes.
See the attached image below - if there was some rotating animation where i have circled in red, after someone presses the “Check now for Updates” button, it would give an indication that the app is doing something on that command.
Any message like “searching for update…”, “update found…” , “downloading definitions…”, “completed”, etc would be even more informative.
thanks for your help !

http://i.imgur.com/G4c3vTp.jpg