From Here you have 2 Choices, Option 1: Just start the new zeitcoin-qt.exe and let it sync from scratch , (take 2 or 3 days), if it pauses during the sync, you can just leave it , or restart it and it will jump over the slow spots.
Option 2: Fast Way if you don't want to wait for the Blockchain to sync from the beginning. Go to Any of the Following Links to get a copy of the Zeitcoin Blockchain from Jan 18th, 2015.
Make sure Zeitcoin is closed Then Unpack and copy & replace the files from Zeitcoin-Blockchain into C:\Users\"username"\AppData\Roaming\Zeitcoin Then open Zeitcoin and it will start syncing the BlockChain from the Jan 18th, 2015 instead of the start.