How can I keep my iPhone X 4K video quality when editing on my workstation?

I want to edit video from my iphone X in software on my desktop.  I've changed my Video to record at 4K/60fps.  I save the video to my Dropbox account, then bring into Movavi Video Editor.

When I save, the highest quality option is 4096x2160, 256:135, 30fps.  My video clips still seem low def.  Is this a limitation of the software?  Is there a better video editor to use with video from an iPhone?  Or is the way I save it to Dropbox making it lose quality?  Thank you.
MLGIS Program ManagerAsked:
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David Johnson, CD, MVPOwnerCommented:
Don't forget to save at highest quality and a trial of the software gave me a lot higher fps settingsmovai settings
Can't you just copy it from your iPhone to your computer?Export settings

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