I cannot sync with the network either.  Out-of-date blocks is nearly 17000 at this point.  I can connect to 15 other users yet watch the out-of-date blocks tick up every minute.  Everything was working fine and staking until the fork.
Downloaded v3.3.3 and deleted the Peers.dat file.  UPnP is checked and it shows as active on my router's UPnP list.  Are there additional ports I need to open?  I had to manually do so when BitBean updated a few months back.

Only thing I haven't tried is starting fresh with v3.3.3 from a wallet backup.  Don't want to wait a day re-downloading the chain if I can avoid it.  Any suggestions would be welcomed.  Thanks.