How do I get a copy of AIPath.cs that is editable?

According to optimization steps here Optimization - A* Pathfinding Project I should remove some code in AIPath.cs, however I’m not sure how I get the editable version of this file. I only have the dll version.

Hi

Yeah, that is only possible if you have the source code installed in your project.
Alternatively, you can make a copy of the AIPath script and do whatever changes you want.