......Can I download the versions before
The version 1.11
Hi.
Congrats with your SX900.

There is no need to download any older firmwareversions.
It would not be for any use as long as the update you did was a successful anyway. Better to keep eyes open if any new updates shows up.
I peeked into the SX European website, and there is only v.1.11 downloadable, among some other drivers and related software.
Have fun with your SX900.
https://europe.yamaha.com/en/products/mu...ml#product-tabs