Our favorite hero Bavo Luysterborg got into discussion of bringing back the Start Screen as you can see above. The point is whether this trick that worked for Build 9841 would work for 9926.
He went ahead and tried it himself as follows:

Bring back the pre-9926 start menu in 9924:
HKCUSoftwareMicrosoftWindowsCurrentVersionExplorerAdvancedEnableXamlStartMenu – DWORD 0

He then tweeted the following:

As you can see, the old Start Screen is back. So this Registry Hack still works in Build 9926 of Windows 10 January Technical Preview. Just follow his instruction of checking the Flags in the Taskbar properties for Start Menu as shown and make sure you log out and login again to load the new setting.

Let us know if this works for you or not.

Thanks Bavo for an excellent work as usual.