How to restore Multibit HD keys using cloud .zip.aes files
If you have your seed words, I would suggest giving up on Multibit and either using "Simple Bitcoin Wallet" or "Breadwallet", apps for Android/iOS - other users are saying they are able to retrieve their Bitcoin using their previously MultiBit-managed Bitcoin holdings by simply importing their seed words. If you get this to work, please let me know.  

MultiBit has been discontinued as a supported product and hundreds of users are having these problems.