Bigbox is always updated along side Launchbox as they are two different parts of the same program and are just the one installer. So if using a newer Launchbox you are also using a newer Bigbox, so you will get the expired license message. As i said you need to be on a version of Launchbox that was released during the time your license was active, I would have a look in your Launchbox/Updates folder to see if you have a old installer, of course if you recently downloaded Launchbox again you will not have any old version installers. If that is the case you can send a email to support@unbrokensoftware.com and explain the situation and request a installer that will work with your license.