Currently there is some kind of bug at wallets, all you need to do is close it and open, Colin( developer) is already working into a new version to handle this issue) just use escrow and avoid be scammed, this month raiblocks should reach its first exchange, being mercatox or any other that wanna support this currencie that is returning will full power.
I also notice that the new version 7.7 took very long to sync I've running it for three days but no success in syncing it,while the old version I'm also using only took an hour to sync,but I would like to only use the latest version because I don't trust 7.5 because it's an old wallet,looking forward to the new version.