Hi sdrum,
This is the error from your log:
'The older version of Affinity Photo cannot be removed. Contact your technical support group..'
Can you download and run this from Microsoft:
https://support.microsoft.com/en-gb/help/17588/windows-fix-problems-that-block-programs-being-installed-or-removed
Run that and select having trouble installing and let it do its check for issues. When it's finished try running our setup again as the Administrator and it should then install the update.
