Wallet has stopped synchronizing with message "sync failed"

[coast75]

With the wallet not synchronizing, no new deposits are showing in the wallet and the deposit address remains the same. There are 2 deposits which are not being received by the wallet, yet are showing in xmrchain.net
At time of writing there are 57000 blocks remaining...this grows every minute
Regardless of the node selected, the wallet fails to synchronize. Nodes are active and showing millisecond connection speeds between 200ms and 509ms
Please advise how this synching issue may be resolved.
Existing v 1.0.6
There is an updated version available which seems to install in a separate location. If I restore the existing wallet to that version, will it bring across the new deposits?
Regards,
Trevor