MuseScore 3 default instruments.xml file

ETA:
Right after I posted this, I found the bit of XML I'd messed up. All sorted now!

Hi,

I'm working with MuseScore 3.6.2, and have been happily mucking about with the instruments.xml file.

Foolishly, however, I didn't think to take a copy before making any changes. I've managed to do something that has caused almost all of the instruments to disappear from the list in MuseScore, and can't figure out what the problem is...

Is anyone able to provide me with a copy of the default instruments.xml file for MuseScore 3 please? (I've been able to find the default file for MuseScore 4, but not 3.)

Thanks!