If you enter in your existing ST2 license key it should work. At the moment ST3 is still in beta (it only just came out of alpha testing), which means you don't need to upgrade your license until it's fully released. At the moment, Sublime Text 2 is the only stable version.
If you enter in your existing ST2 license key it should work. At the moment ST3 is still in beta (it only just came out of alpha testing), which means you don't need to upgrade your license until it's fully released. At the moment, Sublime Text 2 is the only stable version.