Power / Reset navigation not working for BootMii

I am currently using Letterbomb to load into the latest (1.2 as of what I see now) BootMii installer. I get the anti-scam message and then load into the screen showing that Homebrew and BootMii can be installed and that I should select continue. The problem is that neither the power nor reset buttons actually do anything, and I do not have a GC controller, so trying that is not really an option.

Any help is greatly appreciated.

That screen is not bootmii, it is what is known as the Hackmii installer and handles installing bootmii and HBC only. Use a wiimote to control the menu options.