Without Plugin and Database to restore WordPress manually is not very difficult. If it is not database problem, you just need to upload the backed up “wp-config.php” file and “wp-content” folder to wordpress directory in your hosting account. And then your site will be OK to run normally.
To upload the backed up wp-config.php file and wp-content folder for restoring wordpress manually, you may use hosting file manager service.
OR on the other hand to use FileZilla (File Transfer Protocol) to upload wp-config.php file and wp-content folder follow this: