Ok, been thinking back to when I did mine and think I may have given you some wrong info, sorry I was thinking of another package, Oops!
When I did bulk uploads, DT woulod become totaly unresponsive, my PC fans would increase and under task manager I could see Disk IO and high CPU agains DT but DT would either not respond to mouse clicks or respond after a very veryl long significan delay, if I tried to click or do anything I would also get "program unresponding" message on task manager at times
After lots of trials and error I found that just leaving DT alone preferable the PC as well so I did all my bulk imports overnight .
I also found that If you press the window key sequence "Window key" + "M" Windows will show you the home screen and DT will be an icon on your task bar. If you look at the icon you will notice that it has started to turn green, this is the progress that DT is doing and it will slooooowly turn greener (if you are importing K's worth and depending on amount and speed of your PC)
So just check that icon every half hour or hour and see if it is slowy moving
So to answer your question, I woujld leave it going and see how it looks in the morning