Beginner info needed

[tmuhlhausen]

trying to figure out the basics of code editing, have all the toold required, just cant follow the tut as im having an issue "and dont quote me on this" with my base? problem is the tut is designed for 1.11b i presume. something tells me all of the offsets are changed by a specific number and i need to convert by adding to the offset possibly?

Any help is much appreciated