Previous versions of NPP displayed the BOM character.
NPP now suppresses its display through applied styles, (Encoding Menu).
Look in a hex-editor, its still present.
IIRC, deleting the BOM,
then attempting loading into FSX caused the file's processing to fail.
So, IIUC one need only save as "eXtensible Markup Language (*.XML)" output file type in the NotePad++ 'Save As Type' pick list ?
Regarding the XML merging -
Are any developers overwriting/reassigning any of MS's original entries ?
Or are they just appending their own extra entries ?
FYI: Jim Robinson was testing an interesting alternative workflow to "edit" autogen object GUID entries in custom local *.AGN files using a non-edited default AutogenDescriptions.spb ...here:
Perhaps Jim might share an update on how this methodology is working ? (thanks, Jim ! )