If you dont have anything to save like Single Player worlds of Screen Shots or Server Addressed. You can just erase the whole .minecraft folder. It will redownload from the website as a fresh install.
I want to add code to the fishhook event for its velocity change. That is the method I used to modify the base minecraft jar but I don't know where to get access to the event or the entity inside Forge.
Where is a good place to get access to the events from: NetClientHandler.java. I am new to Forge and trying to get my head around how to override things from the base client.