It was not a very long time passed since the Ultrasurf 9.96 version released but today they have released its latest version 9.97 to bypass surfing restrictions. Its publishers are really working very fast to protect surfers privacy.
But there is a one big question why it really need to use the latest version if other older versions works well with the firewall applied. So the simple answer is that firewall manufacturers also updates their database with the most of the latest proxies and their software to block them from proper function and may be in some organisation where the older versions still works may be that they have not updated firewall database. And whenever it do older version will not work?
So why take chances if you are using Ultrasurf to bypass firewall restriction then update whenever it their a new version released… it is only 450kbs in size.