I had requested to be notified via Email whenever I received a Forum reply to my Post, but did not get any notifications, so I didn't know that three of you had answered me! Thanks everybody!
I spent hours and hours trying to fix this on my own, and finally, so corrupted Avast! that I had to remove it via the Avast! Unistall Utility via Windows Safe mode, and then had to remove a leftover .exe file in order to redownload it! In the process (which included System Restore), I had to redownload several other software programs as well! What a mess!
Finally, I got Avast! 4.8.1169 back and functioning correctly, but still with the same lack of the Avast! icons!
And, THEN, I come to this Forum again, see "Tech's" answer, and the whole problem was solved! Right-clicking on Properties, and selecting the Icon did the trick! Thanks, Tech!!!
Hours of work for nothing--just because Avast! didn't send me my Email notifications of replies as requested! That ticks me off. . . .