Often when you download a incomplete collection you need a single file or two. You then have to go to one of the search tabs to search for each filename, and redownload it. It would be very handy if there was a right-click menu on the download (on the collection) and the par2 (collection, and filename) tabs for both global and per-engine searches. This might look like:
Right-click
> Search -global default/current days
>> Newzleech - default/current days
>>> possible days
>> NLSS -default/current days
>>> possible days
>> ...
