The false positive may well have been corrected.
members.stg is a database file of contact’s personal information. The numerical tag is probably not a file but probably some sort of descriptor.
DAME is a virus dating back to 1993- such detections are often FP’s.
If the FP hasn’t been corrected by avast!, changes to the database file caused by adding, removing or updating contact details may have changed the character sequence causing the detection.
If avast! has moved the file, you will have lost you contact details in Windows Live Messenger, so you will need to restore the file.
Add it to the exclusions list to prevent detection if the FP has not been corrected.
