I’ve updated the Windows VB Script today to correct a few minor deficiencies. Some shortcut keys were being missed out, now included; Macros and PLE commands are now in the list; additional colours have been added.
It sounds like the script is saying the xml file is corrupt, somehow. I suggest you open Cubase, and open the Key Commands dialog, and save your current key commands as a preset.
Then, load that new preset, then quit Cubase, and run the script again.
In saving the preset Cubase will write the file correctly. Let us know if that works.
Did you follow the installation instructions in the readme.txt file? It looks like you didn’t put the script in the ‘User Settings Data Folder’ but ran it from a Temp folder.