DC maintains history of last 21 locations that's being visited in a tab which is shown as drop down when left clicked on path bar. However it shows repetitive list, like if I have visited my desktop twice it will show twice in the list. I would suggest eliminate the repetition. Before updating the dirhistory.txt file I would suggest the program to check if the link is existing & if so it shouldn't update the file. This way we will also have more unique paths in history.
to DC, its best when transferring files over network (speed wise) as compared to other free managers. TC also gives the same performance but at a cost.