Just discovered that I need to run Duplicati as Administrator (Seems obvious now) to see Hyper-V as an option.
Was a daft question after all.
Thanks.
For anyone else reading this I did the following to get a hyper-v backup working.
1.) Install Duplicati on hyper V Host
2.) Ctop Duplicati from the tray icon.
3.) Copy the contents of AlphaVSS folder overwriting files (C:\Program Files\Duplicati 2)
4.) Install the Visual C++ Runtime (Its under “Other Tools and Frameworks” at Download Visual Studio Tools - Install Free for Windows, Mac, Linux)
5.) Start Duplicati as an Administrator
6.) When creating a backup you will now have Hyper-V options as well as the file system.
See also: