No the Tweak Ui is probably not here, but if you google it you should find it easily enough.
To roll back the driver you go to Device Manager ( r-click on My Computer, scroll to Properties, l-click , l-click on Hardware tab, l-click on Device Manager,l-click on + next to display adapter to expand the tree,r-click on the name of your adapter,scroll to Properties,l-click on driver tab, l-click on Roll Back driver).
If that button is not available, meaning you cannot roll back to the previous driver, then you will need to download the previous version from the ATI site or the web.
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