Some help:
Paste database tables structure you wish to update from to the left text area and the structure of tables you wish to update to to the right one and press 'generate update sql' button.
You may take the structure using well known PhpMyAdmin tool this way:
Select the database you need
Open "Export" tab
Check the tables whose structure you need to update in the left box
uncheck "Data" checkbox at the bottom and press "Go"
Here you have the table structure you may copy and paste to this page.
In a case you have any feedback or questions feel free to send them to ger.kirill @ gmail.com or post them here.