I already got my refund as promised. If you decide to make another try at it, I’m still interested and I have a friend that would be interested as well. I would have loved to be a small part of this. The fact that you promptly refunded money when the goal wasn’t reached should increase your already high-level of trust, and might make it easier to raise money in the future.
The fact that all money has been refunded speaks highly of the integrity of those managing this project. I’d imagine a second IPO attempt, perhaps with a longer time window, will have a much better chance of achieving full funding.