Look at https://www.playitsoftware.com/Support/FAQs/How-do-I-back-up-my-data
If you move the data there (I guess for Windows 10 it will be in the same place as Windows 8) to the new PC and put the tracks in the same place on the new PC my guess is it will "just work". Your external drive for music will have to have the same drive letter as on the old PC.
Mike Sutcliffe