I've uploaded the file civicrm-5.8.2-wordpress.zip into the plugins folder and unzipped it. I've activated the plugin. The first time through this process the installer ran to the point of creating the database, but then this error shows up on the CiviCRM dashboard:
"Sorry, due to an error, we are unable to fulfill your request at the moment. You may want to contact your administrator or service provider with more details about what action you were performing when this occurred. DB Constraint Violation - contact_id should possibly be marked as mandatory for DashboardContact,create API. If so, please raise a bug report."
I deactivated and uninstalled the plugin, unzipped it again and activated it. Same error. And the Settings menu does not show a CiviCRM Installer.
CiviCRM shows up in the left nav menu of WP, but clicking on it gives the same error above.
Any guidance would be much appreciated!