When upgrading from CDSEO Basic you need to be sure to uninstall CDSEO basic first. This instruction is provided to you when you are upgrading. This would include reverting any file changes, and also involve removing this code from .htaccess:
Code:
<Files candle>
SetHandler application/x-httpd-php
AcceptPathInfo On
</Files>
<Files candles>
SetHandler application/x-httpd-php
AcceptPathInfo On
</Files>
If you hire us for install we'll take care of all this for you and ensure it is done 100% accurate.