I have a very old install of Asterisk 1.4 on PIAF, that has been silently working away for many years. One of the best features on it is the no longer available skype for asterisk by digium. Which works brilliantly! However now its time for a much needed upgrade to 13. How can I upgrade and not loose the licence. Digium arn’t renewing these anymore. I know theres a new way to use skype with the freeswitch stuff but that all seems like too much effort!