Change IDF File After Setting Up OpenStudio Project

edit

I started a new OpenStudio project in the SketchUp Plug-in by importing an IDF file.

I have gone through the process of setting spacetypes and construction when I discovered I had an error in the original IDF file I imported.

How can I manually change the IDF file (delete those lines of the file) so that when I open and simulate the OpenStudio project it will not read in that error?

There are a number of in.idf files in the folder structure that I have tried editing but the error persists.