How do I change the default Save path?

Right now, when I try to save a new file, it defaults automatically to a "projects" folder, and I have to navigate to the correct folder every time.

There are 2 ways. Either you right click in the project on the correct directory and choose "new file" (it will then suggest that location instead) or you use the "favorites" in the default save dialog, that allows you to set a number of favorite directories for faster navigation. Afaik the normal save dialog will always start out in th projects folder.

I'm not sure what version you use, but in 5.2 it defaults to current active project directory (bolded in the Workspace)
Also, I'd note that you can create new file by Right clicking in the Workspace.
The only case when it defaults to the "projects" directory is when you have no projects at all. If so, just create one