diff --git a/bundled-addons/claude-connector/lib/clients.cjs b/bundled-addons/claude-connector/lib/clients.cjs
index beede4b4..9b5c5c95 100644
--- a/bundled-addons/claude-connector/lib/clients.cjs
+++ b/bundled-addons/claude-connector/lib/clients.cjs
@@ -104,12 +104,53 @@ const claudeCode = {
 
 // ---- Claude Desktop ------------------------------------------------------
 
+// Pick the Claude Desktop config path, preferring whichever install is
+// actually present on this box.
+//   • Classic installer / per-user: %APPDATA%\Claude\claude_desktop_config.json
+//   • Microsoft Store install: the Store virtualises AppData under
+//     %LOCALAPPDATA%\Packages\Claude_<publisher-id>\LocalCache\Roaming\Claude\
+//     — the Store app's "AppData\Roaming" is that folder, not the user's.
+// If both exist (or neither), the classic path wins; register() creates
+// a fresh config under whichever directory is already there.
 function desktopConfigPath(opts = {}) {
   const { e, platform, home } = env(opts);
-  if (platform === "win32") return path.join(e.APPDATA || path.join(home, "AppData", "Roaming"), "Claude", "claude_desktop_config.json");
+  if (platform === "win32") {
+    // A Microsoft Store install of Claude Desktop virtualises AppData under
+    // its package folder; the Store app never reads the classic %APPDATA%\
+    // Claude\ path, so a config dropped there is invisible. Prefer the Store
+    // path whenever a Claude_<id> package is present. Fall back to classic
+    // otherwise.
+    try {
+      const packagesDir = path.join(e.LOCALAPPDATA || path.join(home, "AppData", "Local"), "Packages");
+      if (fs.existsSync(packagesDir)) {
+        const match = fs.readdirSync(packagesDir).find((n) => /^Claude_/i.test(n));
+        if (match) return path.join(packagesDir, match, "LocalCache", "Roaming", "Claude", "claude_desktop_config.json");
+      }
+    } catch {}
+    return path.join(e.APPDATA || path.join(home, "AppData", "Roaming"), "Claude", "claude_desktop_config.json");
+  }
   if (platform === "darwin") return path.join(home, "Library", "Application Support", "Claude", "claude_desktop_config.json");
   return path.join(e.XDG_CONFIG_HOME || path.join(home, ".config"), "Claude", "claude_desktop_config.json");
 }
+// A broader "is Claude Desktop installed" signal than just the config
+// folder existing — the Store install may not have created the roaming
+// folder yet, and the Program Files install leaves per-user folders empty
+// until the first launch. Any of these says "yes, it is here".
+function desktopInstalled(opts = {}) {
+  const { e, platform, home } = env(opts);
+  if (fs.existsSync(path.dirname(desktopConfigPath(opts)))) return true;
+  if (platform !== "win32") return false;
+  const packagesDir = path.join(e.LOCALAPPDATA || path.join(home, "AppData", "Local"), "Packages");
+  try {
+    if (fs.existsSync(packagesDir) && fs.readdirSync(packagesDir).some((n) => /^Claude_/i.test(n))) return true;
+  } catch {}
+  for (const p of [
+    path.join(e.LOCALAPPDATA || path.join(home, "AppData", "Local"), "AnthropicClaude"),
+    path.join(e.LOCALAPPDATA || path.join(home, "AppData", "Local"), "Programs", "Claude"),
+    path.join(e["PROGRAMFILES"] || "C:\\Program Files", "Claude"),
+  ]) { try { if (fs.existsSync(p)) return true; } catch {} }
+  return false;
+}
 
 // Claude Desktop starts stdio servers only: it runs Theseus itself in Node
 // mode with the relay, which reads the address from Theseus's endpoint file.
@@ -143,13 +184,17 @@ const claudeDesktop = {
     const cfg = readJson(file);
     const entry = cfg && cfg.mcpServers ? cfg.mcpServers[NAME] : null;
     return {
-      installed: fs.existsSync(path.dirname(file)),
+      installed: desktopInstalled(opts),
       configured: !!entry,
       current: !!params.url && sameDesktop(entry, desktopEntry(params)),
     };
   },
   async register(params, opts = {}) {
     const file = desktopConfigPath(opts);
+    // Create the config directory if needed — the Store install virtualises
+    // AppData so the Roaming\Claude folder may be absent until first write;
+    // Claude Desktop will pick up the file we drop next to it.
+    try { fs.mkdirSync(path.dirname(file), { recursive: true }); } catch {}
     if (!fs.existsSync(path.dirname(file))) throw new Error("Claude Desktop was not found on this computer (no Claude settings folder)");
     editDesktopConfig(file, (cfg) => {
       if (!cfg.mcpServers || typeof cfg.mcpServers !== "object") cfg.mcpServers = {};
@@ -165,4 +210,4 @@ const claudeDesktop = {
   },
 };
 
-module.exports = { claudeCode, claudeDesktop, findClaudeCli, claudeCodeConfigPath, desktopConfigPath, httpEntry, desktopEntry };
+module.exports = { claudeCode, claudeDesktop, findClaudeCli, claudeCodeConfigPath, desktopConfigPath, desktopInstalled, httpEntry, desktopEntry };
diff --git a/package.json b/package.json
index c99be1ab..5e8a3e08 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "theseus-navigator",
-  "version": "0.3.125",
+  "version": "0.3.126",
   "license": "MPL-2.0",
   "description": "Theseus Navigator — a browser that follows the thread. By Silent Mode, a Deviant project.",
   "author": "Silent Mode",