Hi Andy ,
I created a blog from scratch using a "Dormant" domain I have.
Installed Affiliate Hoover and get the following:
Warning: Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/xxxxxxxx.co.uk/wp-content/plugins/affiliate-hoover/home.php:77) in /home/xxxxx/public_html/xxxxxx/wp-includes/option.php on line 563
Warning: Cannot modify header information - headers already sent by (output started at /home/xxxxx/public_html/xxxxx/wp-content/plugins/affiliate-hoover/home.php:77) in /home/xxxxx/public_html/jxxxx/wp-includes/option.php on line 564
This appears on each Admin page.
I will test using URL direct anyway and see how it goes.