1) Give [[dbprefix]] for cookie_prefix in config.php
2) We have added upgrade from 7.02.06 So just check upgrade process for next version for confirmation
3) Select "Central Time (US and Canada)" in manual installation.
4) PHP REQUIREMENT LINK: readme-en.html
5) We have disabled upgrade for major update 9.0 from 7.x because upgrade script doesn't work with mysqli extention. 
https://github.com/php-fusion/PHP-Fusion/issues/2045