How to edit XMP file?

Hello! 

I have a xmp file that I use as colour profile in Lightroom, I now want to alter some of the settings in this xmp file, how do I do it? 

i have used text editor to open the xmp file but it doesn't fully show what changes were made to the xmp file.

 
is there a way to open this xmp file and edit it? 

thank you