Virus chest does return the files to their original locations, but Slugman chose to move not to the chest but to a folder. In this case original locations are lost. You have to move files manually.
VRDB system would start if you chose “Repair”. But I’m afraid it will not work now when files are not in their original locations.

Edit:
You can find the original locations in system log with avast LogViewer or in file Avast4\Data\log\Warning.log.