The file name format resembles this description: (so there's a high chance that it is a Multibit classic wallet)
Wallet backups. These are two more directories where backups are made of your wallets. One stores backups for encrypted wallets, the other for unencrypted wallets. These files are in the format 'saving-YYYYMMDDHHMMSS.wallet' and 'saving-YYYYMMDDHHMMSS.info'.
With your reply, I guess you've downloaded the "
classic" not the HD version and successfully selected the file, right?
then that "
word" must be your passphrase.
If not, download the
Multibit Classic instead of Multibit HD and use "
File / Open wallet" and browse t the location of your wallet file(s).