SyncToy - Multiple Unselect VERY cumbersome

Currently to unselect a branch of a directory tree you need to deselect each
individual branch - which is very cumbersome. I suggest that if a directory
tree is expanded then it should work as it does now (ie: deselecting a parent
does not deselect the children), but if a directory tree is collapsed then
deselecting the parent should also deselect all the child branches. An
alternative is to allow multiple select (ie: hilighting) of branches (using
the cntl or shift click technique) and when you select or deselect an item
that is hilighted, then the action propagates to all the hilighted branches.

Either one of these techniques would be a significant improvement to the
user interface. Otherwise - great program.