Changing Passolo Server machines

I have Passolo 2011 set up on one machine using a FlexM server configuration. I am considering moving it to another machine before updating to Passolo 2015 then 2016. If I remember correctly someone from SDL has to generate my license file after I sent them a configuration string. Is this still the process? What happens to my old license file on the old machine, is it shut down by SDL? One thing I am trying to avoid is a break in process where while one machine is being set up the other machine is still operational. Please advise me on my best approach.


Thanks!
Darrell