Bug 1304 - Starting Save or Export directory is not set, so is unwritable or requires authentication for most users

I have done as suggested in the bug comments, and used:
Windows: Users\username\Documents
Unix/Mac: ~/Documents .

We could though use GetLocalizedResourcesDir() and could use Music rather than Documents.

src/Project.cpp

@@ -4182,6 +4182,15 @@ bool AudacityProject::SaveAs(bool bWantSaveCompressed /*= false*/)
    TitleRestorer Restorer(this); // RAII
 
    wxFileName filename(mFileName);
+   // Bug 1304: Set a default file path if none was given.  For Save/SaveAs
+   if( filename.GetFullPath().IsEmpty() ){
+      filename.AssignHomeDir();
+#ifdef __WIN32__
+      filename.SetPath(filename.GetPath() + "\\Documents");
+#else
+      filename.SetPath(filename.GetPath() + "/Documents");
+#endif
+   }
 
    wxString sDialogTitle;
    if (bWantSaveCompressed)

src/export/Export.cpp

@@ -518,7 +518,15 @@ bool Exporter::GetFilename()
    }
    maskString.RemoveLast();
 
-   mFilename.SetPath(gPrefs->Read(wxT("/Export/Path"), ::wxGetCwd()));
+//Bug 1304: Set a default path if none was given.  For Export.
+#ifdef __WIN32__
+   wxFileName tmpFile;
+   tmpFile.AssignHomeDir();
+   wxString tmpDirLoc = tmpFile.GetPath(wxPATH_GET_VOLUME);
+   mFilename.SetPath(gPrefs->Read(wxT("/Export/Path"), tmpDirLoc + "\\Documents"));
+#else
+   mFilename.SetPath(gPrefs->Read(wxT("/Export/Path"), wxT("~/Documents")));
+#endif
    mFilename.SetName(mProject->GetName());
    while (true) {
       // Must reset each iteration