Program does not record date of last scan

Avast Free Antivirus / Premium Security
1

The program works fine except after doing a scan of files it does not record the date of the last scan. It always reads, scan not done yet.

2

Read this thread for the answer
http://forum.avast.com/index.php?board=2;action=display;threadid=1413

or this one:
http://forum.avast.com/index.php?board=2;action=display;threadid=7922