Funny, I use the MediaCreatorTool and it's far simpler than that, haven't had similar issues as Grall above.Nobody uses the Media Creator Tool - just download the ESD image directly from Microsoft and convert it to ISO file using free ESD tools, then make a bootable USB with Rufus.
ESDs for Windows 10 RS3
forums.guru3d.com/threads/official-windows-10-rs3-fall-creators-update-build-16299-15.416866/
(look for rs3_release_clientconsumer_ret_x64fre_en-us )
ESDtoISO (GUI)
bit.ly/TenForums
Step by step guide: tenforums.com/tutorials/2570-esd-iso-create-bootable-iso-windows-10-esd-file.html
ESDDecrypter
github.com/gus33000/ESD-Decrypter
DecryptESD
github.com/hounsell/DecryptESD
etc.
Rufus
rufus.akeo.ie
Actually, I think Grall might be confused a bit - the "Windows 10" without any extras is Home or Pro depending on which key you use, other options it gives me is Home with single language and N aka the "EU version without Media Player which no-one has ever actually installed"