ProPresenter updates are safe: any installed copy counts as running, the newest version opens

- newest_of picks by CFBundleShortVersionString, not file name (ProPresenter.app sorted after ProPresenter 20.1.app)
- mac_start takes newest_of; auto-setup uses it for programs on the Companion Mac
- WS and SC switched over; NA's ProP restart re-rendered (same pick today)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_settings.py

@@ -376,3 +376,30 @@ class TestBindingAndProbes(unittest.TestCase):
 
 if __name__ == "__main__":
     unittest.main()
+
+
+class TestNewestCopy(unittest.TestCase):
+    """An update installed beside the old copy: the newest version opens, whatever the file names."""
+
+    @unittest.skipUnless(sys.platform == "darwin", "reads app versions with macOS's defaults")
+    def test_the_newest_version_wins_not_the_last_name(self):
+        import subprocess
+        from settings import builders as b
+        for names in ((("Show 20.0.1.app", "20.0.1"), ("Show.app", "20.1.0")), (("Show 20.0.1.app", "20.0.1"), ("Show.app", "19.4"))):
+            root = tempfile.mkdtemp(prefix="sp-apps-")
+            for name, ver in names:
+                os.makedirs(os.path.join(root, name, "Contents"))
+                subprocess.run(["/usr/bin/defaults", "write", os.path.join(root, name, "Contents", "Info"),
+                                "CFBundleShortVersionString", ver], check=True)
+            out = subprocess.run(["/bin/sh", "-c", b.newest_app(root + "/Show*.app") + 'echo "$APP"'],
+                                 capture_output=True, text=True).stdout.strip()
+            want = max(names, key=lambda n: tuple(int(x) for x in n[1].split(".")))[0]
+            self.assertEqual(os.path.basename(out), want)
+
+    def test_any_copy_counts_as_running_but_never_a_helper(self):
+        import re
+        from settings import builders as b
+        m = b.app_match("/Applications/ProPresenter*.app", "ProPresenter")
+        self.assertTrue(re.search(m, "/Applications/ProPresenter 20.0.1.app/Contents/MacOS/ProPresenter"))
+        self.assertTrue(re.search(m, "/Applications/ProPresenter.app/Contents/MacOS/ProPresenter"))
+        self.assertFalse(re.search(m, "/Applications/ProPresenter.app/Contents/MacOS/ProPresenter Helper (Network)"))