Hello,
My name is Habibe.
I'm interested in your project. I have several years of experience working with xml data structure.
And i recently worked on a similar project.
To help you , i think of using web tech (JS) in order to create simple tool that can load your xml file,
parse it and modify nodes as wished probably with a ui interface .
So, I'm waiting for your feedback , to discuss more on the project !
Best regards !