quantum mechanics - How do probabilities emerge in the many-worlds interpretation?

My understanding is that at each quantized unit of time that a split occurs, every possible recombination of particles occurs in the 'objective' universe. If this is the case, what relevance to probabilities hold to the behavior of the objective universe, and why do we observe these probabilities in the subjective universe?

I'm way beyond my educational depth here to understand the technical explanations available, and since I couldn't find a non-technical explanation online to help with developing some intuitive grasp, I was hoping someone here might be able to provide an explanation of this question.

It seems like if every moment every recombination occurs at each quantized branch split in the objective universe, then probability would be meaningless to the objective unfoldment of the universe, as every possible combination should occur exactly once, right? Why then, would distinct probability models hold from one quantized moment to the next.

For example, why is it anymore likely that from one moment to the next my computer continues to exist and I can type this post, rather than my computer turning into a purple elephant than my body being transported to mars and then to the andromedas galaxy and then to Bangladesh, then split into a billion pieces and reform as another creature, etc. etc. if all of these possibilities have already unfolded in the objective universe?

If all possible universes occur and are equally likely, how could probability emerge in a single branch? If they are not objectively all equally likely and probability does apply, how many times does the most likely possibility outcome occur relative to the least likely but quantifiable possibility in a single split?

Reiterated another way, how does probability dictate subjective reality so apparently if it is non-existent in a many-worlds interpretation of quantum mechanics that fulfills every possible particle combination of the universe? Alternatively, what am I failing to understand?

'How do probabilities emerge within many-worlds?' @ http://www.hedweb.com/manworld.htm#probabilities is unfortunately beyond me at this time, but perhaps holds the answer.