Need Help Installing Multi DB

I still don’t get clear instruction how to install multi db plugin…

1. I have do all step in the instruction.

2. Upload both the db.php and db-config.php files to your wp-content directory.

3. upload move-blogs.php inside wp-content called “scripts” and uploading the file there.

4. double check

But I still don’t know where to put folder “multidb” in zip file (plugin>>multidb)?

When I put the multidb folder into wp-content>>plugins folder I get this message

Houston, we have a problem!

Looks like you need to create your new db’s! If you’re lucky, this link still works – click me

Database Error: Unknown database ‘wp_global’