BUG - Plexamp will not refresh download after changing settings

Server Version#:4.159.0
Player Version#:4.12.4

I want to download a full playlist that is 21 days long, when I start downloading the playlist it will download only 38 files that is 3 days and 2 hours.

If I edit the download and change it to maximum, save and refresh the download list - nothing happens.

Nothing happens also if I shorten the time to less than 72 hours.

Please help…