Virtual Conversion in Ghost 15 - Only Latest Backup Available for Conversion

I recently had a situation in which a hardware problem caused data corruption. I was able to determine that the corruption had started about a week before the system failed entirely. As a temporary fix, I wanted to perform a virtual conversion of one of my Ghost backups and run this machine as a VM on another machine until I had a chance to completely rebuild and restore to the dead machine.

 

For some reason, Ghost would only let me convert the most recent backup. Note that my backup scheme is to perform a weekly complete backup followed by daily incremental backup. I maintain at least one month of backups.

 

Is it expected behavior to only be able to perform a virtual conversion of thge very latest backup or is there some way that I should be able to point to one of my previous backups?