Oh no not another free will thread.

[GrandizerII]

This would still completely invalidate the theist notion of free will, regardless of the nature of time and regardless of whether parallel worlds are a thing. God knows what you will inevitably do in this or that specific timeline because the choices are hardcoded into the system. If choices were made freely in the libertarian sense of the term, then there's no logical way God could 100% know what you end up doing in the future.

Here's my time travel hypothetical.

Bob video tapes Larry choosing between a banana and an orange.  Larry chooses an orange of his own free will.  Bob sends the video tape back in time to himself.  Bob now knows Larry will choose an orange.

Does Bob's knowledge of Larry choosing an orange make him choose the orange?  Or does Larry choosing an orange of his own free will cause Bob to know Larry will choose the orange?

No, see my previous response. Full knowledge of a future choice C does not necessarily determine the choice, but such knowledge does indicate it isn't a choice made freely in the libertarian sense.