Adjusting Pre-existing Hex Overlays

Using Fractal Terrains 3, I've created a map I'm more-or-less happy with and exported it as a Cosmographer template.

This template has a hex grid that is roughly 7 across for each triangle or whatever the proper term is.

I'm wanting to use this map with GURPS instead of Traveller, and I prefer the 9-across hex map they use in GURPS Space for planetary mapping.

Is there an easy way to adjust the hex map for these purposes?

If not too much trouble, please explain as if I'm an idiot. I find the UI of CC3 to be byzantine and if I take a break from it for more than a week, I can't remember how to do anything.
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