Its great that there is a fix for the coal and ore multipying bug, but how do i use it? Thanks to another post, i found i needed java, but whenever i try to open any of the files in the slipcor/tools ddirectory, a window pops up for a second and then gone...

So what part of java do i need to run? or which file in the fix do i need? 

Thanks in advance

.jar files are java's file package format. You run the entire .jar file, not any specific file inside it.

Just right click on the MyLittleSaveGameFixer-0.0.81.jar file and select Open With. Then select Java(TM) Platform SE Binary.

Here's a picture. 

Awesome mate. Thank you. +1 for you