Export Files From old Backup

Hi,

Please help because I have a disaster here.

I made an old backup through backup exec 15 from maybe one month ago on Windows Server 2012 (Encrypted Backup).

The backup have full backup <-- ( expired ) and incremental backup 2 time per day.

My hard drive crashed ( my backup files in a share backup direcrtory ).

I tried to restore full backup from last backup point but no luck. It restored crashed windows (always ask for repair).

Please help me how can i at least extract files from my .bkf (Encrypted Backup) files and restore it manually.