Make a full site backup before updating theme.
To update your theme to new version just add new and replace changed files.
Don't forget to clear Magento Cache after uploading new files.
Added - Magento 1.9.0.1 support
Fixed - Magento 1.8 compatibility problems
app/design/frontend/default/looklike/layout/checkout.xml
Remove file - app/design/frontend/default/looklike/template/checkout/onepage.phtml
Remove file - app/design/frontend/default/looklike/template/review/form.phtml
Fixed - Bundle product price live update calculations
app\design\frontend\default\looklike\template\bundle\catalog\product\view\type\bundle.php
fixed - Twitter Slider now show tweets correctly
app/design/frontend/default/looklike/template/newsletter/subscribe.phtml
skin/frontend/default/looklike/css/styles.css
js/twitter/jquery.tweet.js
Initial release