Hi all. I have had a similar problem. Downloaded the above version but no matter what type of disc I cut it wouldn't work. A search of the web found these guys - http://www.navigationau.com.
So I ordered the 2019 nav disc for my 08 IS250 SL with a bit of trepidation as you have to transfer funds to their bank account. Anyway the disc arrived with 4 days of the funds transfer, slotted it in & it works like a bewdy - all for $100! Much cheaper than Lexus who wanted $450 fitted.