I trialed an older version of CBB VM Edition to find that Item level restore wasn't working from a Hyper-V VM Backup. Support advised it would be fixed in v5.8. before I goto the effort of reinstalling and getting another trial I thought I would ask if it had been fixed. I found the 5.8 release notes in the forum here and there is a bug fix:
Failure to restore virtual machines backed up from the Hyper-V server with configuration version 8.0
3577.
It depends on the issue you were having with file-level restore of that particular backup. If you have a case ID, I could check and see if that particular problem was fixed.
A trial extension would be great. If a trail licence is attached to an email address can it be on the address of the support ticket please. @clevaholdings.com.au