Clean install but cannot access the Plugins folder

I had problems with my site and made back-ups. Deleted all content (WP 4.3.1) deleted the DB and then re-installed 4.4 with new login details. The site loads ok but the when clicking on “Plugins/Installed Plugins” get an error message (wp-admin/plugins.php) Oops! That page can’t be found.

If I click on “Settings/General” and make a change, there is no save button at the bottom.

This a completely new install, what could be the problem?

Thanks in advance
Drachsi