There are tooltips and hints embedded into ultra_outliner interface. To get it - just hover cursor over an interface element and after a second the tooltip will be displayed.
If you wait two seconds more, the tooltip window will be expanded and additional details will be explained with graphical illustration or animation.
The program is in active research and development stage, so there are a lot of number of bugs and errors. If you find one of them - report me about it, and it will soon be fixed.
Remember, only reproducible scenarios of getting an error can be used to catch it.
It is best to report about the problem on the forum, because if someone is faced with the same problem - they will see the discussion.
If you do not have the ability to write to the forum - write to the support e-mail.