You can restore individual files against a whole VM. And it works on all your existing delta backups.
You must use the latest XOA release. When you connect with the console, you should see
Build number: 16.12.20. If you have this or higher (eg
17.*), it means that's OK! Otherwise, please download your new XOA.
Restore files from a SMB remote is not yet possible, but it's planned for the next release!
File level restore is only possible on delta backups
Go into Backup/File restore section:
Then, click on the VM where your files are, and follow the instructions: