It is typical situation when some author of some addon or mod canceling development of his project.
Sooooo... Is it legal to decompile and rewrite any abandoned addon to make it compatible with newer versions of game and IC2?
I can ask permission (or even source code) from author in case if I have contact with author?
But what should I do if author for example not joinining forum for a years and abandoned any modding for some reason? Can I create port in that case?