The new thumbnailer automatically detects when a local file has been changed and re-generates the thumbnail in that case. If remote artwork changes, but the local file is not updated, it re-checks once every two weeks, in case album art has been added or updated in the server.
The new thumbnailer automatically detects when a local file has been changed and re-generates the thumbnail in that case. If remote artwork changes, but the local file is not updated, it re-checks once every two weeks, in case album art has been added or updated in the server.