Cannot get rescue disk to boot

I have installed Backupper Standard 4.0.6 and attempted to create a rescue disk. I first built a Windows PE version which booted into the standard Windows 10 layout but I cannot see how I use this disk to get into my Backupper images etc.

I then built a Linux disk  but that fails to boot at all. I built it as an iso and burnt it with Imgburn.

So at the moment I am without a useable rescue disc!

Thanks for any help.