Upgrade Sugar Open Source
Sugar Open Source v2.5 to Sugar Open Source v2.5.1 

1. Backup your v2.5 database.
2. Run the SQL upgrade script in order to upgrade the database to the 2.5 
   schema.
      - 2.5-2.5.1_open_db_upgrade.sql
3. Unzip the 2.5.1 application into your Sugar web root
4. Run the installer by going to 
    http://<your_machine>/<sugarcrm_root>/install.php and point your 
   system to the upgraded database.  
   NOTE: DO NOT select "Drop and re-create existing SugarCRM tables?"
5. Rename or remove your <sugarcrm_root>/install/ directory for security 
   purposes
6. Remove write permissions to your config.php file for security purposes
 
You have now successfully upgraded to Sugar Open Source v2.5.1.  Enjoy!