Using EasySync is easy - just:
Set up a sync recipe, either by running the wizard, or manually, then
Drag-and-drop the folders you want to sync onto the EasySync window (shown below). Note that you can only specify folders, not individual files.
EasySync will populate the right pane of the window with a list of files to be deleted. Check the list, deselect any you don't want to sync, then click the trash button in the lower right of the EasySync window.