when disk full 4kdownloader crash and forgets the download list!

While downloading in the night disk space gets full. In the morning I deleted some other files but 4k wasn't clickable. so I had to "end task" from task manager.
When I open it again it was empty. There was nothing on the list. It is loosing database when crash. We need some solution like backing up db automaticly. If it crashes continue with backup. Or any other solution.
Thanks for your effort.