diff --git a/package-lock.json b/package-lock.json
index 6feb28d..5c27704 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "folio",
-  "version": "0.1.10",
+  "version": "0.1.8",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "folio",
-      "version": "0.1.10",
+      "version": "0.1.8",
       "license": "MIT",
       "dependencies": {
         "@tiptap/core": "^2.27.2",
diff --git a/package.json b/package.json
index c5472ce..afb7897 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "folio",
-  "version": "0.1.12",
+  "version": "0.1.10",
   "description": "A simple, local, open-source desktop writing app.",
   "productName": "Folio",
   "author": "Folio Contributors",
diff --git a/src/main/index.ts b/src/main/index.ts
index e666950..80749cd 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -1220,100 +1220,46 @@ handleIpc("folio:performUpdate", async () => {
       app.getPath("temp"),
       `folio-update-${Date.now()}.tar.gz`
     );
-    // Downloads go through curl, not Chromium's network stack: on flaky Wi-Fi
-    // the Electron net stack restarts requests mid-stream, producing a
-    // right-sized but corrupt gzip ("100% three times, then failed"). curl
-    // resumes with HTTP Range (-C -) so a dropped connection continues where
-    // it left off instead of restarting, and retries internally. We still
-    // verify the exact byte count and gunzip the whole file before handoff.
+    // Downloads of the ~100MB asset have twice truncated near the end while
+    // the server copy stayed intact. The old 2-byte magic check could not
+    // see that, so the detached installer failed after the app had quit and
+    // the update silently no-oped. Now: retry the download up to 3 times,
+    // require the advertised byte count, and gunzip the whole file before
+    // handing off. A corrupt file is deleted and the user gets a real error.
+    const { Readable } = await import("stream");
+    const { createWriteStream } = await import("fs");
+    const { pipeline } = await import("stream/promises");
     const total = Number(asset.size) || 0;
     let lastError = "";
     let downloaded = false;
-    const { spawn } = await import("child_process");
-    const haveCurl = await new Promise<boolean>((resolve) => {
-      const p = spawn("curl", ["--version"], { stdio: "ignore" });
-      p.on("error", () => resolve(false));
-      p.on("close", (code) => resolve(code === 0));
-    });
-    if (haveCurl) {
-      for (let attempt = 1; attempt <= 3 && !downloaded; attempt++) {
-        const code = await new Promise<number>((resolve) => {
-          const c = spawn(
-            "curl",
-            [
-              "-fsSL",
-              "-C", "-", // resume a partial file
-              "--max-time", "900",
-              "--retry", "5", "--retry-delay", "2", "--retry-all-errors",
-              "--connect-timeout", "15",
-              "-o", tarball,
-              asset.browser_download_url,
-            ],
-            { stdio: "ignore" }
-          );
-          const timer = setInterval(() => {
-            try {
-              getWindow()?.webContents.send("folio:update-progress", {
-                received: fs.statSync(tarball).size,
-                total,
-              });
-            } catch {
-              /* file not created yet */
-            }
-          }, 1000);
-          c.on("error", () => { clearInterval(timer); resolve(-1); });
-          c.on("close", (rc) => { clearInterval(timer); resolve(rc ?? -1); });
+    for (let attempt = 1; attempt <= 3 && !downloaded; attempt++) {
+      try {
+        const res = await fetch(asset.browser_download_url, {
+          redirect: "follow",
+          signal: AbortSignal.timeout(10 * 60 * 1000),
         });
-        if (code !== 0) {
-          lastError = `Download failed (curl exit ${code}).`;
+        if (!res.ok || !res.body) {
+          lastError = `Download failed (HTTP ${res.status}).`;
           continue;
         }
-        const size = fs.existsSync(tarball) ? fs.statSync(tarball).size : 0;
-        if (looksTruncated(size, total)) {
-          lastError = `Download truncated (${size}/${total} bytes).`;
+        let received = 0;
+        const source = Readable.fromWeb(res.body as never);
+        source.on("data", (chunk: Buffer) => {
+          received += chunk.length;
+          getWindow()?.webContents.send("folio:update-progress", { received, total });
+        });
+        await pipeline(source, createWriteStream(tarball));
+        if (looksTruncated(received, total)) {
+          lastError = `Download truncated (${received}/${total} bytes).`;
           continue;
         }
         if (!(await verifyArchiveGzip(tarball))) {
           lastError = "Downloaded archive is corrupt (gzip stream incomplete).";
-          fs.rmSync(tarball, { force: true }); // corrupted resume file must not poison the next attempt
           continue;
         }
         downloaded = true;
-      }
-    } else {
-      // No curl on PATH: fall back to the in-process fetch pipeline.
-      const { Readable } = await import("stream");
-      const { createWriteStream } = await import("fs");
-      const { pipeline } = await import("stream/promises");
-      for (let attempt = 1; attempt <= 3 && !downloaded; attempt++) {
-        try {
-          const res = await fetch(asset.browser_download_url, {
-            redirect: "follow",
-            signal: AbortSignal.timeout(10 * 60 * 1000),
-          });
-          if (!res.ok || !res.body) {
-            lastError = `Download failed (HTTP ${res.status}).`;
-            continue;
-          }
-          let received = 0;
-          const source = Readable.fromWeb(res.body as never);
-          source.on("data", (chunk: Buffer) => {
-            received += chunk.length;
-            getWindow()?.webContents.send("folio:update-progress", { received, total });
-          });
-          await pipeline(source, createWriteStream(tarball));
-          if (looksTruncated(received, total)) {
-            lastError = `Download truncated (${received}/${total} bytes).`;
-            continue;
-          }
-          if (!(await verifyArchiveGzip(tarball))) {
-            lastError = "Downloaded archive is corrupt (gzip stream incomplete).";
-            continue;
-          }
-          downloaded = true;
-        } catch (e) {
-          lastError = `Download failed: ${(e as Error).message}`;
-        }
+      } catch (e) {
+        lastError = `Download failed: ${(e as Error).message}`;
       }
     }
     if (!downloaded) {
@@ -1348,6 +1294,7 @@ handleIpc("folio:performUpdate", async () => {
     // systemd-run puts the script in its own transient unit that outlives us;
     // verified to survive on this machine. Fall back to a detached spawn for
     // non-systemd sessions.
+    const { spawn } = await import("child_process");
     let handedOff = false;
     try {
       const { execFileSync } = await import("child_process");