Why not create a new Flurbo with different Algo such as cryptonote or similar?
Do a premine for the total amount of current coins in circulation and then let users swap those old buggy coins for the new ones, exchange will need new integration but that´s not difficult.
Just my 0.000002BTC
Can't send to swap address if chain is not moving.
No need to send anything anywhere.
A snapshot of the current blockchain will suffice.