Sgp 2.6.1.398 wont start up

Steve,
You may want to checkout this post:

Also we recently changed our licensing servers and because of this have created a 2.7 release which uses the new servers. 2.6 should continue to work on any existing installations but if you find yourself needing to reinstall you’ll need to use 2.7 and use the new license code that was emailed to you a few months back…or you can get it by logging into your account on our new system.

Jared