@DeViL303 I've been trying to find a solution for 3 days. Whenever I installed the ultimate toolbox the HEN enabler disappears. I'm on firmware 4.91 and the options for enabling hen in the toolbox go upto 4.90. I'm using version 4.90-4.91 beta of the toolbox. Updating HEN to bring back the enabler removes the ultimate toolbox.
Could you verify if this patch fixes your issue? It basically adds 4.91 HEN enabler to Toolbox menu.
BTW it's exactly the same enabler for 4.89. You can use that option if you don't want to install the test pkg.