Repairbuddy is a tool that allows you to correct a WordPress install when things go wrong.
RepairBuddy is a Beta tool that is currently bundled with BackupBuddy.
To enable RepairBuddy, go to the BackupBuddy Settings and enable RepairBuddy. From there, RepairBuddy will show up in the left menu under "Repair".
To download RepairBuddy, you must enable RepairBuddy in the BackupBuddy settings.
When viewing the RepairBuddy section within BackupBuddy, you must enter a password. After the password has been entered, you can download and install RepairBuddy.
RepairBuddy must be installed in the same directory that you have installed WordPress.
To run RepairBuddy, simply visit: http://yourdomain.com/repairbuddy.php (assuming, of course, that your WordPress install is at the web root of your site)