Well... you can and then again you can't... Can you modify your beta syfypatch.xml to point to the right servers? Sure but what else do you need to do? Can you install the live game into the beta folders? Maybe... BUT, what ever you do, it's not likely to be error free and Trion CS will prolly say it;s not supported. IMO, it's best to uninstall all previous versions of Defiance and get a clean install of Live. Of course, if you live in Australia... go for it to avoid the download.
[Update] A few minute ago, Kahuna (the German Community Manager) posted:
"Die Aussage dort ist leider falsch. Der Beta-Client wird nicht weiter verwendet werden können, ein kompletter Neudownload wird nötig sein." in this thread:
http://forums.defiance.com/showthrea...l=1#post111009
He is saying that the statement is false. The Beta Client will NOT be updateable, a complete new download is required.
I've known Kahuna (Hergan) for a long time. I KNOW he isn't making this up. He is relaying the official Trion position.