One of the community members created a cool online tool which allows you to explore Survivalcraft worlds without using the game.
Here’s it is: http://survivalcraftexplorer.sourceforge.net
You need to give it a .scworld file and it will display all the modifed chunks in the world (i.e. the ones that were altered from the generated default). You can also view locations of various ores.
I hit a roadblock when working on the skins for 1.25 – that’s why it’s still not ready for release. The roadblock is to do with skins and block textures management, I wanted to change the way it’s all handled, to give you more control. Unfortunately it turned out it’s a lot more work than I expected – in fact I am still dealing with the mess :-) Anyway, I don’t expect it will take much more time now. Hopefully.