diff --git a/core/download_orchestrator.py b/core/download_orchestrator.py
index 879d0f52..1984c0a6 100644
--- a/core/download_orchestrator.py
+++ b/core/download_orchestrator.py
@@ -113,6 +113,22 @@ class DownloadOrchestrator:
             if hasattr(amazon, '_client') and amazon._client:
                 amazon._client.preferred_codec = quality
 
+        # Let registry-backed plugins refresh any config they cache at
+        # construction time. This covers Prowlarr-backed torrent / usenet
+        # clients without rebuilding the registry and losing active downloads.
+        for name, client in self.registry.all_plugins():
+            if not hasattr(client, 'reload_settings'):
+                continue
+            try:
+                client.reload_settings()
+                logger.info("%s client settings reloaded", self.registry.display_name(name))
+            except Exception as exc:
+                logger.warning(
+                    "%s client settings reload failed: %s",
+                    self.registry.display_name(name),
+                    exc,
+                )
+
         # Reload download path for all clients that cache it.
         # Soulseek owns the path config and is reloaded above; every
         # other source mirrors that path so files all land in one
diff --git a/tests/downloads/test_download_orchestrator.py b/tests/downloads/test_download_orchestrator.py
index e157047e..b551750e 100644
--- a/tests/downloads/test_download_orchestrator.py
+++ b/tests/downloads/test_download_orchestrator.py
@@ -198,6 +198,37 @@ def test_reload_instances_with_no_args_reloads_every_source():
     assert b.reload_called is True
 
 
+def test_reload_settings_refreshes_registry_plugins(monkeypatch):
+    """Settings saves should refresh plugins that cache config at init.
+
+    Prowlarr-backed torrent / usenet clients keep a ProwlarrClient
+    instance, so without this hook newly-saved indexer settings only
+    took effect after process restart.
+    """
+
+    class _ReloadSettingsClient(_FakeClient):
+        def __init__(self):
+            super().__init__()
+            self.reload_calls = 0
+
+        def reload_settings(self):
+            self.reload_calls += 1
+
+    torrent = _ReloadSettingsClient()
+    usenet = _ReloadSettingsClient()
+    orch = _build_orchestrator(torrent=torrent, usenet=usenet)
+
+    monkeypatch.setattr(
+        'core.download_orchestrator.config_manager.get',
+        lambda _key, default=None: default,
+    )
+
+    orch.reload_settings()
+
+    assert torrent.reload_calls == 1
+    assert usenet.reload_calls == 1
+
+
 # ---------------------------------------------------------------------------
 # Singleton factory (matches Cin's get_metadata_engine pattern)
 # ---------------------------------------------------------------------------
diff --git a/tests/test_torrent_usenet_plugins.py b/tests/test_torrent_usenet_plugins.py
index 57f11079..1dd9f75b 100644
--- a/tests/test_torrent_usenet_plugins.py
+++ b/tests/test_torrent_usenet_plugins.py
@@ -381,6 +381,34 @@ def test_usenet_is_configured_requires_both_sides() -> None:
 # ---------------------------------------------------------------------------
 
 
+def test_usenet_reload_settings_refreshes_cached_prowlarr_config(monkeypatch) -> None:
+    """Settings saves must update the plugin's held ProwlarrClient.
+
+    The active usenet adapter is rebuilt from config on each call, but
+    ProwlarrClient is cached inside the plugin. This is the path that
+    used to require a process restart after entering Prowlarr settings.
+    """
+    settings = {
+        'prowlarr.url': '',
+        'prowlarr.api_key': '',
+    }
+    monkeypatch.setattr(
+        'core.prowlarr_client.config_manager.get',
+        lambda key, default=None: settings.get(key, default),
+    )
+
+    plugin = UsenetDownloadPlugin()
+    assert plugin._prowlarr.is_configured() is False
+
+    settings.update({
+        'prowlarr.url': 'http://prowlarr:9696',
+        'prowlarr.api_key': 'secret',
+    })
+    plugin.reload_settings()
+
+    assert plugin._prowlarr.is_configured() is True
+
+
 def test_plugins_conform_to_protocol() -> None:
     from core.download_plugins.base import DownloadSourcePlugin
     assert isinstance(TorrentDownloadPlugin(), DownloadSourcePlugin)