Railworks America

Subject kinda wraps it up, how does one edit that file type. Google seemed pretty unhelpful. What programs do you use to edit them too?

Notepad? If not, try RW-Tools.
Just as a hint, most Railworks files are either:
- text files that you can directly edit with a text editor; or
- text files that have been "compiled" and need to be decompiled through serz.exe before being edited.