all of the downloadable worlds are not compatible with WINDOWS 10 EDITION, and I would like to know where I can find ones that are compatible to download.
One way is to simply find the WIN10 version of that map file on google. I'm damn sure you would definitely get one or the other file compatible for that.
Here's a bit weird video and some people claiming it worked for them.
But remember, any world that has to do with JAVA EDITION is completely incompatible with WIN10.
All the best!!