Thanks CULTFRANCE16, I sent them another message with more information and they replied, but havent replied to my response to that yet.

Darthguyx reminded me about novaexchange, they had shut down our wallet and market for the swap, but they were closing down so we didn't check back in with them.  They now have new owners and the market appears to be re-enabled so I've emailed them to check if they are on the v1 or v2 chain, it should be fine anyway as their wallet should have been offline all of this time.  Will update if/when they reply.