I wouldn't have thought so as ESET ormally advise a clean install once the final release comes out. It could have changed though.
It may work but I have found that the best practice is to do a clean install of the final release. Some changes between the last beta and final may cause some issues. I have every intention of doing that when the time comes.
I'm not online all the time and I didn't want a surprise of non working protection system when I boot up.
Eset will more then likely have a final release out by the expiration date or extend the expiration date as needed.