I compiled the new source code on my Mac. Deleted all files except wallet.dat and reopened, but it seems to be stuck on block 14000.
Yes, this is what must be done. Just KEEP YOUR WALLET.DAT and remove everything else.
Start the new wallet and we are on block 14000, or maybe 1 or 2 more.
Bittrex and pools should update, we are on a new fork. All what has been done after block 13999 is cancelled, don't panic.