Thanks for reporting, we will check.

EDIT: Re-opened as https://www.ventismedia.com/mantis/view.php?id=15133#c53315

retested with 2188

issue persists.

also noticed that when an album has two tracks with exactly the same title, it looks like it may download just [url=https://www.dropbox.com/s/fvq8vi5n04vhkh4/one%20track%20twice%20maybe.png?dl=0]one of the tracks twice[/url], as well as not updating the tags as before.

another couple of observations, the UI remains very delicate while the download batch is in progress:
[list]I got this dump; 6B95657C [/list]
[list]and I also had one instance where MM5 hung ... no dump, but I had to end MM5 via the Task Manager[/list]

I downloaded some albums ... all tags get into MM5, as expected.
But the tags do not always get updated into the downloaded tracks.
It seems to be triggered when multiple tracks have titles that start with a common string ... I could not see any example which did not include this situation

examples:
[url=https://www.dropbox.com/s/05q26cgoicdn294/no%20tags%201.png?dl=0]example 1[/url]
[url=https://www.dropbox.com/s/4bdb062uqak4y2s/no%20tags%202.png?dl=0]example 2[/url]