You can download it here:
https://support.ubi.com/en-gb/FAQ.as...0000000eSrvCAE
If the above direct link doesn't work, you may need to login to the support site first: http://uplay.ubi.com/en-GB/about/faq
Click on 'Advanced Search'. Select from the drop list 'Platform' then select 'Hawx 2' on the right
You'll find the link under the FAQ "Problems starting UPLAY PC"
Maybe there's a similar FAQ/link if you're using other platforms.


