Hello,

I would like to add that I observe following problem:
- When the list is empty all buttons are enable. They should be disable

I just wonder if we could integrate the buttons with the array, I think the would look better. And why they are placed from right to left and not from right to left like toolbar

Restart to defaults would be handy option If someone mess there. For example I was on the previous version and when updating to current default engines are not there. This is true for all settings!