[IMPOSSIBLE DOWNLOAD VERSION 1.7.0.....]

hello to all,
I’m dealing with a big problem...
I bought Affinity Photo in January 2017,
latest installation with update version: 1.6.5.135

when opening the software, I am told that a free update can be installed
the 1.7.0.367 via the serif site..... not previously notified!

I started the installation from the site, "my account" "download 1.7.0"

disaster: a tab appears: "installation in progress".... then: "failure close"?
does the operation twice, the same result.....

in despair of cause, I completely uninstalled the entire old Affinity program
version and have nothing left...

I have followed the installation guide but this one blocks to failure.....

I don’t know what to do...

Thank you for helping me solve these big problems....
cordially and have a good day.