I started cs50edx in 2014 & took a long break over year-end. When I returned, edx guided me towards the new cs50x 2015. There were pset changes from 2014 to 2015, and I can't figure out how to update the code in ~cs50. For example, in "Mispellings" (pset6 in 2014; pset5 in 2015), the code for "dictionaries" & "texts" is in my ~cs50/pset6 folder. But Speller (which the instructions say not to modify) expects it to be in ~cs50/pset5.
How can I align the contents of these ~cs50 folders with this year's psets? FWIW, I'm using the same computer as in late-2014, just with a new license for Appliance.
I'm well out of my depth on this and would appreciate any help.