BuddyPress.org

I’m trying to disable and delete a MultiSite completely where my primary site is a BuddyPress website which I want to keep as single WordPress (Non-MultiSite) installation. Other websites (total 4) were regular sites that I have already removed.

Removing the specific codes from wp-config and htacces to disable MultiSite gives database error and WordPress shows a database repair screen. When I run the repair following error comes:

Some database problems could not be repaired. Please copy-and-paste the following list of errors to the WordPress support forums to get additional assistance.

databasename_posts: Table ‘Database-User-Name_posts’ doesn’t exist
databasename_comments: Table ‘Database-User-Name_comments’ doesn’t exist
databasename_links: Table ‘Database-User-Name_links’ doesn’t exist
databasename_options: Table ‘Database-User-Name_options’ doesn’t exist
databasename_postmeta: Table ‘Database-User-Name_postmeta’ doesn’t exist
databasename_terms: Table ‘Database-User-Name_terms’ doesn’t exist
databasename_term_taxonomy: Table ‘Database-User-Name_term_taxonomy’ doesn’t exist
databasename_term_relationships: Table ‘Database-User-Name_term_relationships’ doesn’t exist
databasename_commentmeta: Table ‘Database-User-Name_commentmeta’ doesn’t exist

My question is : Is there a way I can back-up my BuddyPress users with all their xProfiles data, avatars, album photos and login capabilities, completely remove my installation, reinstall it from scratch and then restore the BuddyPress as it is now?

Any ides?
Thank you for the help