I have BootMii installed as Boot2
My current Boot2 version is 2 according to DOP-Mii
If I update it to v4 it will delete BootMii from Boot2
Will I be able to re-install BootMii as Boot2 after updating?
If I update to system menu 4.2U with DOP-Mii
what are the effects?
would all the homebrew still work?
should I do it?
Read here, top of the list. And the answer is no, you should not update.