USBclean has been granted Full Disk Access in System Preferences in macOS Mojave. When viewed in Windows 10 Pro, attached file contains two errant files easily identified by their "._" prefix. How can these be successfully removed in USBclean?

Long time Cookie subscriber but new to v5. Hung on to Mavericks for probably too long. 5's a whole 'nuther animal and I like it.

While making myself familiar with the many tweaking additions Russell has added to Preferences, on the General tab I couldn't help but notice the choices of Enable sub-domain Favoriting and Manage Cookie types separately. My first reaction was: OK fine. What advantage or disadvantage is there in their selection? I don't do facebook or twitter and help on the app is pretty much not a condition, which is why I'm here.

What do they mean, what do they do?

Charlie