Welcome to the forums - as @jorn says I would be surprised if there was a full convert/import approach - but as @anais says here they are looking at ways to help with the process of moving over (also the 2nd post on that thread may be of use as well) Adobe Muse dev/support ending - Switching to Webflow?
If you are on twitter - maybe follow @callmevlad too - he mentioned that Webflow are looking into how they can smooth the process:
