I'm sorry but it was a while ago and off the top of my head I don't remember where or how I found it.

It appears that the original XG site is not working at the moment, while the Sondius site,( the syxg100 was a collaborative effort between Sondius and Yamaha), is gone completely.

I would suggest contacting Yamaha UK directly and inquiring. I'm sure they have the update patch for the SYxg50.

Regards,

AJ