1. Start Notepad program
  2. In Notepad, open the fileAVAST4.INI, that´s located in
    C:\PROGRAM FILES\ALWIL SOFTWARE\AVAST4\DATA.
  3. Find the section [Common] and the row
    Database=ODBC
  4. Change this row to
    Database=XML
  5. Save the file
  6. Restart your computer