I think they need to give answer to this, this is where such havoc starts with a coin
Burn the old ones, or keep them as a memento. Your choice.
Why people are mentioning lot of ticker name here and it makes very confusing about those ticker names. What is the exact ticker name to add in MEW. So when will the distribution starts and what are the exchanges you are planning to list the Spectre.
The distribution has started and you have a very clear tutorial here :
https://medium.com/teamspectreai/guide-to-converting-your-sxs-tokens-to-sxu-and-sxd-tokens-with-myetherwallet-metamask-compatible-eb5615c5821eAs for now people chose to convert mostly to dividend (18M tokens sent) rather than to utility (3M tokens sent only).
I would have converted to dividend as well, but given the distribution, utility token might be a winner here.