Helpful Ideas to consider

Select the engines you see in the screenshot and then right click and malcombey choose "uncheck engines with no/do follow links. Then disable the option for "doing both" as shown below. This will deselect all the no follow engines.
I also deselect fluxbb forum as for me they're all no follow. Sometimes I deselect discuz forum if pointing links at my homepage, as they are all url anchor links. So depends on what you want the software to do. You need to improvise when needed.