Thank you for the reply j.p.s.
I must be missing something obvious though (a brain, perhaps?) - because when I right mouse on the url link for the update, it's given as:
https://www.amazon.com/update_Kindle_Oasis_10th_Gen
Apologies if I've done something silly.
EDIT: um - so I used this url:
https://s3.amazonaws.com/firmwaredow..._v2_5.14.1.bin
Just wanted to check - is the v2 part correct, even though it's the 3rd version (10th gen) Kindle Oasis?
Thanks!