No new version, but your sync issue appears to be already resolved.
You won't see Blackbytes by continuing the sync. By their nature, they are a private asset and are stored only in your backup.
I have a full backup from 2017, when was the first time the black bytes were created/distributed? The synch is still hanging in 2018... the other assets have also only come with time...
The bottleneck is usually in CPU or disk speed, not in network connection.
You don't need to be connected to witnesses. In fact none of the witnesses accepts connections.
The sync takes about one day per day, Obyte runs on an i7 of the 7th generation with a CPU utilisation of about 10%.
As I said, sync won't recover them. They are only in your backups.
Currently the Blackbytes balance is still at zero in 2018, and it's a Full Backup from 2017.