Can I edit a project file directly, using Notepad, for instance?
Yes, although you shouldn’t have to. The project files are actually text files so you can edit them using any text editor. They are formatted like the INI and INF files that Windows uses, so section headers and the names of each parameter are also listed in the file and this should make finding what you are looking for easy. Be careful, however, because the values used for many of the settings are not obvious.