This is a cut and paste of Dogbert's earlier request. I've repeated it here because it is a sorely needed improvement.

"Differential mp3 files import -
As each time I add a few albums to the database, I find it easier to import the entire directory which contains my whole library (instead of selecting each album's directory individually). When doing so, the albums which have been previously added to the database are - effectively - deleted and added again, causing any information which I've added manually to be deleted. Can albums which are already in the database not be updated, importing only the new (sub)directories ?"