As they told you already, I bought the "PBP-4-UP" update in 2011; I have the activation code, but I don't understand why it's called that, if it's an update to PBP3 (3.09 or 3.010?).
I remember that I had abandoned everything because I always encountered new problems with MPLABX.
Thanks for the directions.
Now I'll try to install everything on a new partition with Win10 pro 64bit