How do I restore a wallet from a backup file in MultiBit HD? If I have a backup file like mbhd-*.zip.aes how do I restore it using only my password? When I click on Restore Wallet, it only asks for the wallet words, not the file path or password.
You can't.

Security of a MultiBit wallet is broken into four parts:


A wallet encrypted by the password but not the wallet words
A wallet backup, kept in the cloud, encrypted by the wallet words.
"Wallet words," kept on a piece of paper
A password, kept in your head.


You have 2 and 4, but not 1 or 3. My understanding is that that's not enough to restore your wallet. If you had your wallet words, or access to the computer that created this wallet, it would be different.