BackupExec is used for Disaster Recovery. However, in order to recover your data, you will have to get the BackupExec server up and running again, which means having access to a tape drive, just in case, then restoring your data.
How do you expect to get the data off without access to a tape drive? Even if your data were to reside on a removable hard drive, you will still need to have BackupExec reinstalled on a new computer to then catalog the drive contents, and restore what is needed. If you have IDR, you can even recover entire systems. However since you have such an old version of BackupExec, that was a pay for option that you may own. Where as newer versions of BackupExec include it for free now.