You can install straight, but it's generally recommended in guides to first go to the OFW3.55.
It shouldn't be a problem, as the cFW 3.55 have all the files and will overwrite the 3.41 files.
Just a note.
I don't think there's any "Kmeaw 3.41", you are maybe in MFW 3.41 or in cFW 3.41 Hermes.