SCAN HISTORY PROBLEM

Hi- I have the 18.1.2326 Avast Free Antivirus Version installed on my personal computer. I have Windows 7 installed. I do not find any scan history except for the very last one I run. I have scan history set to delete scans older than 90-days in Settings> Maintenance. Scan history had been working right until I updated to the new version. Why is it not keeping a record of the scan history for the past 90-days?