I have separated this project from the previous one requiring a wordpress upgrade as that isssue got sorted but appreciation to all who expressed an interest in it.
Regarding the same wordpress managed web site, the previous developer opted to give the main pages the structure of [url removed, login to view]
instead of [url removed, login to view]
The result is to see that after several months, the main pages of the site have not been indexed, although pages for the blog, which do end in .html do get indexed. This is despite the use of tags, all-in-one-seo etc. Before the site was converted to .html, this site had first page ranking for most of its specialist terms on most search engines.
So this project is to change the urls of the existing pages and ensure that every page created from here-on-in will end in .html.
It is worth advising that this site is geared towards an adult, but not porn, market. If that would be a problem for you, then please don't waste either my time or yours.
Successful completion of this project does not require SEO knowledge. But if the site structure is not what the search engines want, then no amount of SEO expertise is going to get the site indexed.