Danger, Danger... do NOT delete until you're really sure there's a mistake...
Those different entries all have a purpose of their own.
cheers
If you wish to experiment, just rename with an 'x' like xAVG_aibase.xml...
You may also want to see if there isn't an "AVG_airbase.xml" (sp) and if so,
compare the contents of the two with 'notepad' or some other text editor.
...and happy sleuthing!