I'm not familiar with SuSE so some of these questions may be borderline absurd. Did you run
updatedb and then do a
locate antivir? You'll probably need to do the updatedb with either sudo or as root. Also have you logged out/in or rebooted since installing this application? Sometimes the desktop menu needs a refresh before it displays new items. Lastly, if you still have problems, have you considered using Clam? There is a front-end GUI for it,
KlamAV [sourceforge.net] on SF.