I have two same files URL.db36828 in USER & Program Data sub folders.
Can I delete one of the copies ? Seems it is wasting 1.6 G of Space.
What avast program are you using (Avast Free Antivirus / Pro Antivirus / Internet Security/ Premier) and what version ?
What is the full location ?
I can only find URL.db in C:\ProgramData\AVAST Software\Avast and that is only 21MB.