diff --git a/main.js b/main.js
index 9e4740da..0143334a 100644
--- a/main.js
+++ b/main.js
@@ -12329,7 +12329,12 @@ async function setFileAssociations(on) {
   const classes = `HKCU\\Software\\Classes`;
   const caps = `HKCU\\Software\\Theseus Navigator\\Capabilities`;
   if (on) {
-    await regAdd(`${classes}\\${WIN_PROGID}`, "", "Theseus HTML Document");
+    // The ProgID's default value is the friendly name Windows shows in the
+    // Open-with menu AND in the file-type column of Explorer. Keep it short
+    // — "Theseus Navigator" — not a long "Theseus HTML Document" per
+    // extension. ApplicationDescription under Capabilities is also dropped;
+    // Default Apps picks it up as a tooltip and the long sentence was noisy.
+    await regAdd(`${classes}\\${WIN_PROGID}`, "", "Theseus Navigator");
     await regAdd(`${classes}\\${WIN_PROGID}\\DefaultIcon`, "", `${exe},0`);
     await regAdd(`${classes}\\${WIN_PROGID}\\shell\\open\\command`, "", openCmd);
     for (const ext of FILE_ASSOC_EXTS) {
@@ -12339,7 +12344,6 @@ async function setFileAssociations(on) {
     // Windows Settings → Default Apps for each listed extension.
     await regAdd(caps, "ApplicationName", "Theseus Navigator");
     await regAdd(caps, "ApplicationIcon", `${exe},0`);
-    await regAdd(caps, "ApplicationDescription", "A browser that follows the thread.");
     for (const ext of FILE_ASSOC_EXTS) await regAdd(`${caps}\\FileAssociations`, ext, WIN_PROGID);
     for (const p of DEFAULT_BROWSER_PROTOS) await regAdd(`${caps}\\URLAssociations`, p, WIN_PROGID);
     await regAdd(`HKCU\\Software\\RegisteredApplications`, "Theseus Navigator", "Software\\Theseus Navigator\\Capabilities");
@@ -12376,6 +12380,30 @@ ipcMain.handle("default-browser-state", () => ({
 }));
 ipcMain.handle("default-browser-set", (_e, on) => setAsDefaultBrowser(!!on));
 ipcMain.handle("file-assocs-set", (_e, on) => setFileAssociations(!!on));
+// Auto-register the HKCU "Open with Theseus" entries on first launch so
+// double-clicking an .html / .pdf / .svg / .xhtml file (or picking it from
+// an Open-with menu) just works, with no toggle to flip in Settings. Two
+// per-profile flags:
+//   fileAssocsAutoApplied — first-run rollout. Once set, never auto-apply
+//                           again, so a user who removes the association
+//                           by hand (registry or Default Apps) stays opted
+//                           out across restarts.
+//   fileAssocsLabelFixed_1 — one-time re-write for 0.3.124+: the old progid
+//                           default was "Theseus HTML Document" which looked
+//                           verbose next to the per-extension entry in the
+//                           Open-with menu. Rewriting it to "Theseus
+//                           Navigator" is idempotent and only fires once.
+function autoApplyFileAssociations() {
+  if (process.platform !== "win32") return;
+  const needFirstRun  = !settings.fileAssocsAutoApplied;
+  const needLabelFix  = settings.fileAssocsAutoApplied && !settings.fileAssocsLabelFixed_1 && hasFileAssociations();
+  if (!needFirstRun && !needLabelFix) return;
+  setFileAssociations(true).then(() => {
+    if (needFirstRun) settings.fileAssocsAutoApplied = true;
+    settings.fileAssocsLabelFixed_1 = true;
+    try { saveSettings(); } catch {}
+  }).catch((e) => console.warn("auto file assocs:", e?.message));
+}
 ipcMain.handle("open-system-defaults", () => openSystemDefaultApps());
 if (!process.env.THESEUS_NO_AUTOSTART && !app.requestSingleInstanceLock()) {
   // Another Theseus owns this profile; it got our argv via second-instance.
@@ -12455,6 +12483,10 @@ if (!process.env.THESEUS_NO_AUTOSTART && !app.requestSingleInstanceLock()) {
     // "restart to apply" chip instead of finding out in Settings.
     // boot-time poll now runs from onChromeReady; interval poll (4 h) is fine here.
     setInterval(() => pollAddonUpdates("interval"), 4 * 60 * 60 * 1000);
+    // Register the Windows Open-with entries on first run — no toggle, no
+    // UAC, no user step. Deferred past the toolbar paint so the one-shot
+    // reg.exe fan-out never gets in the way of launch.
+    setTimeout(() => { try { autoApplyFileAssociations(); } catch {} }, 5_000);
     // Launched from an installed app's shortcut: just that app's window; the
     // browser window comes up on the next plain launch (second-instance).
     const appUrl = webapps.appUrlFromArgv(process.argv);
diff --git a/package.json b/package.json
index 43458281..45f2b706 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "theseus-navigator",
-  "version": "0.3.123",
+  "version": "0.3.124",
   "license": "MPL-2.0",
   "description": "Theseus Navigator — a browser that follows the thread. By Silent Mode, a Deviant project.",
   "author": "Silent Mode",
diff --git a/settings.html b/settings.html
index 59973ff3..922b87fd 100644
--- a/settings.html
+++ b/settings.html
@@ -319,8 +319,7 @@
     <a data-sec="passwords">Passwords</a>
     <a data-sec="performance">Performance</a>
     <a data-sec="privacy">Privacy</a>
-    <a data-sec="names">Names &amp; Certificates</a>
-    <a data-sec="plugins">Plug-ins</a>
+    <a data-sec="plugins">System</a>
     <a data-sec="ariadne">Ariadne's Thread</a>
     <a data-sec="aegis">Aegis</a>
     <a data-sec="addons">Extensions</a>
@@ -342,13 +341,6 @@
         </div>
         <label class="sw"><input type="checkbox" id="defaultBrowser"><span class="track"><span class="knob"></span></span></label>
       </div>
-      <div class="row" id="fileAssocsRow" hidden>
-        <div class="txt">
-          <div class="t">Show "Open with Theseus" in file menus</div>
-          <div class="d">Right-click an <code>.html</code>, <code>.htm</code>, <code>.pdf</code>, <code>.svg</code> or <code>.xhtml</code> file and Theseus appears in the Open-with menu. Theseus opens it as a local-file tab.</div>
-        </div>
-        <label class="sw"><input type="checkbox" id="fileAssocs"><span class="track"><span class="knob"></span></span></label>
-      </div>
       <!-- Theseus Shield — chevron opens the Shield add-on's own panel; the
            toggle on the right flips it on/off. State comes from listAddons(). -->
       <div class="row" id="generalShieldRow">
@@ -494,6 +486,7 @@
          these toggles, no further UI churn. Each row's "Not wired yet" caption
          goes away as its adapter lights up. -->
     <section id="names" hidden>
+      <div class="crumb"><a data-go="plugins">System</a> ›</div>
       <h1>Names &amp; Certificates</h1>
       <p class="lede">Decide which name systems Theseus can resolve, and which certificate roots it will trust. BNS (<i>.x</i>, <i>.bch</i>, <i>.sia</i>, …) is always on; everything else is off by default.</p>
 
@@ -602,9 +595,12 @@
       </p>
     </section>
 
+    <!-- "System" (section id stays "plugins" so existing deep links and the
+         plugins-ariadne / plugins-aegis sub-page crumbs keep working — the
+         nav just reads System in the sidebar now). -->
     <section id="plugins" hidden>
-      <h1>Plug-ins</h1>
-      <p class="lede">Silent Mode components that live alongside Theseus — each with its own on/off, updates and settings page. Ariadne's Thread and Aegis now have their own entries in the sidebar.</p>
+      <h1>System</h1>
+      <p class="lede">The Silent Mode components that live alongside Theseus and the name systems the browser can resolve.</p>
       <div class="row" style="justify-content:flex-end;gap:8px"><a class="btn" style="text-decoration:none;display:inline-flex;align-items:center" href="https://theseus.x/plug-ins/" target="_blank" rel="noopener" title="Current signed versions, hashes and how plug-ins update">About plug-ins on theseus.x ↗</a></div>
       <div class="row link" data-go="ariadne">
         <div class="txt"><div class="t">Ariadne's Thread</div><div class="d">System-wide BCDN resolver.</div></div>
@@ -614,6 +610,10 @@
         <div class="txt"><div class="t">Aegis</div><div class="d">Built-in multi-chain wallet.</div></div>
         <span class="chev">›</span>
       </div>
+      <div class="row link" data-go="names">
+        <div class="txt"><div class="t">Names &amp; Certificates</div><div class="d">Which name systems Theseus can resolve, and which certificate roots it trusts.</div></div>
+        <span class="chev">›</span>
+      </div>
       <!-- Hidden hooks: the plug-in init code wires several controls below by
            id (status, toggles, install/update/apply buttons). Keep them in the
            DOM so the sub-pages (plugins-ariadne / plugins-aegis) still work;
@@ -1363,17 +1363,14 @@
   // (today: everything other than Windows).
   (async () => {
     const row = document.getElementById("defaultBrowserRow");
-    const assocRow = document.getElementById("fileAssocsRow");
     const defBrowser = document.getElementById("defaultBrowser");
-    const assoc = document.getElementById("fileAssocs");
     const openSys = document.getElementById("openSysDefaults");
     async function refresh() {
       try {
         const d = await cfg.defaultBrowserState();
         if (!d.supported) return;
-        row.hidden = false; assocRow.hidden = false;
+        row.hidden = false;
         defBrowser.checked = !!d.isDefault;
-        assoc.checked = !!d.hasAssocs;
       } catch {}
     }
     defBrowser.addEventListener("change", async () => {
@@ -1383,12 +1380,6 @@
       if (defBrowser.checked) await cfg.openSystemDefaults();
       setTimeout(refresh, 1000);
     });
-    assoc.addEventListener("change", async () => {
-      assoc.disabled = true;
-      try { await cfg.setFileAssocs(assoc.checked); }
-      finally { assoc.disabled = false; }
-      setTimeout(refresh, 600);
-    });
     openSys.addEventListener("click", () => cfg.openSystemDefaults());
     refresh();
   })();