Exporting would be a good start. Importing I think is quite do-able. Select, prompt for which Perf Location to send to (displaying the current Perf Location names in a list), and have a confirmation if you're importing to a location that already had a valid performance.
Importing 125 Performances would be a time consuming process! Every time you import the next Performance you have to decide on which location. I am not able to remember whether I imported Performance "Little Wing" on 36 or 37 or perhapst at postition 89.
I think we will find many themes in the forum "Bug: Import overwrote my Performance 89. It happened after Update to firmware 9.8.1.1"