I would like to suggest a useful feature.
In tab General (Integration > Joomla articles), you can select a category as a source.
It would be very useful to have an extra option to include subcategory (child category).
For example: you have a News category (parent) and child categories Sports, Politics, Economy, etc.
You could select only News category and "include subcategories" option, so if you later add new child categories in com_content, you don't have to go to JUNewsUltra module and manually add these new categories.