diff --git a/typescript-version/package-lock.json b/typescript-version/package-lock.json
index 371ac46..21c13ea 100644
--- a/typescript-version/package-lock.json
+++ b/typescript-version/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "twitch-vod-manager",
-  "version": "4.1.10",
+  "version": "4.1.11",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "twitch-vod-manager",
-      "version": "4.1.10",
+      "version": "4.1.11",
       "license": "MIT",
       "dependencies": {
         "axios": "^1.6.0",
diff --git a/typescript-version/package.json b/typescript-version/package.json
index 62cbdb9..32cb338 100644
--- a/typescript-version/package.json
+++ b/typescript-version/package.json
@@ -1,6 +1,6 @@
 {
   "name": "twitch-vod-manager",
-  "version": "4.1.10",
+  "version": "4.1.11",
   "description": "Twitch VOD Manager - Download Twitch VODs easily",
   "main": "dist/main.js",
   "author": "xRangerDE",
diff --git a/typescript-version/src/index.html b/typescript-version/src/index.html
index 90e7ead..23fdfa5 100644
--- a/typescript-version/src/index.html
+++ b/typescript-version/src/index.html
@@ -457,7 +457,7 @@
 
                     <div class="settings-card">
                         <h3 id="updateTitle">Updates</h3>
-                        <p id="versionInfo" style="margin-bottom: 10px; color: var(--text-secondary);">Version: v4.1.10</p>
+                        <p id="versionInfo" style="margin-bottom: 10px; color: var(--text-secondary);">Version: v4.1.11</p>
                         <button class="btn-secondary" id="checkUpdateBtn" onclick="checkUpdate()">Nach Updates suchen</button>
                     </div>
 
@@ -502,7 +502,7 @@
                     <div class="status-dot" id="statusDot"></div>
                     <span id="statusText">Nicht verbunden</span>
                 </div>
-                <span id="versionText">v4.1.10</span>
+                <span id="versionText">v4.1.11</span>
             </div>
         </main>
     </div>
diff --git a/typescript-version/src/main.ts b/typescript-version/src/main.ts
index 13d8e32..7afa57d 100644
--- a/typescript-version/src/main.ts
+++ b/typescript-version/src/main.ts
@@ -8,7 +8,7 @@ import { autoUpdater } from 'electron-updater';
 // ==========================================
 // CONFIG & CONSTANTS
 // ==========================================
-const APP_VERSION = '4.1.10';
+const APP_VERSION = '4.1.11';
 const UPDATE_CHECK_URL = 'http://24-music.de/version.json';
 
 // Paths
@@ -30,6 +30,9 @@ const MIN_FREE_DISK_BYTES = 128 * 1024 * 1024;
 const TOOL_PATH_REFRESH_TTL_MS = 10 * 1000;
 const DEBUG_LOG_FLUSH_INTERVAL_MS = 1000;
 const DEBUG_LOG_BUFFER_FLUSH_LINES = 48;
+const DEBUG_LOG_READ_TAIL_BYTES = 512 * 1024;
+const DEBUG_LOG_MAX_BYTES = 8 * 1024 * 1024;
+const DEBUG_LOG_TRIM_TO_BYTES = 4 * 1024 * 1024;
 const AUTO_UPDATE_CHECK_INTERVAL_MS = 10 * 60 * 1000;
 const AUTO_UPDATE_STARTUP_CHECK_DELAY_MS = 5000;
 const AUTO_UPDATE_MIN_CHECK_GAP_MS = 45 * 1000;
@@ -533,11 +536,78 @@ function flushPendingDebugLogLines(): void {
         const payload = pendingDebugLogLines.join('');
         pendingDebugLogLines = [];
         fs.appendFileSync(DEBUG_LOG_FILE, payload);
+        trimDebugLogFileIfNeeded();
     } catch {
         // ignore debug log errors
     }
 }
 
+function trimDebugLogFileIfNeeded(): void {
+    try {
+        if (!fs.existsSync(DEBUG_LOG_FILE)) {
+            return;
+        }
+
+        const stats = fs.statSync(DEBUG_LOG_FILE);
+        if (stats.size <= DEBUG_LOG_MAX_BYTES) {
+            return;
+        }
+
+        const bytesToKeep = Math.min(DEBUG_LOG_TRIM_TO_BYTES, stats.size);
+        const startOffset = Math.max(0, stats.size - bytesToKeep);
+        const buffer = Buffer.allocUnsafe(bytesToKeep);
+
+        let fileHandle: number | null = null;
+        try {
+            fileHandle = fs.openSync(DEBUG_LOG_FILE, 'r');
+            fs.readSync(fileHandle, buffer, 0, bytesToKeep, startOffset);
+        } finally {
+            if (fileHandle !== null) {
+                fs.closeSync(fileHandle);
+            }
+        }
+
+        const firstLineBreak = buffer.indexOf(0x0a);
+        const trimmed = firstLineBreak >= 0 && firstLineBreak + 1 < buffer.length
+            ? buffer.subarray(firstLineBreak + 1)
+            : buffer;
+
+        fs.writeFileSync(DEBUG_LOG_FILE, trimmed);
+    } catch {
+        // ignore debug log errors
+    }
+}
+
+function readDebugLogTailFromDisk(): string {
+    const stats = fs.statSync(DEBUG_LOG_FILE);
+    if (stats.size <= 0) {
+        return '';
+    }
+
+    const bytesToRead = Math.min(stats.size, DEBUG_LOG_READ_TAIL_BYTES);
+    if (bytesToRead === stats.size) {
+        return fs.readFileSync(DEBUG_LOG_FILE, 'utf-8');
+    }
+
+    const buffer = Buffer.allocUnsafe(bytesToRead);
+    let fileHandle: number | null = null;
+    try {
+        fileHandle = fs.openSync(DEBUG_LOG_FILE, 'r');
+        fs.readSync(fileHandle, buffer, 0, bytesToRead, stats.size - bytesToRead);
+    } finally {
+        if (fileHandle !== null) {
+            fs.closeSync(fileHandle);
+        }
+    }
+
+    const firstLineBreak = buffer.indexOf(0x0a);
+    const slice = firstLineBreak >= 0 && firstLineBreak + 1 < buffer.length
+        ? buffer.subarray(firstLineBreak + 1)
+        : buffer;
+
+    return slice.toString('utf-8');
+}
+
 function startDebugLogFlushTimer(): void {
     if (debugLogFlushTimer) {
         return;
@@ -569,7 +639,7 @@ function readDebugLog(lines = 200): string {
             return 'Debug-Log ist leer.';
         }
 
-        const text = fs.readFileSync(DEBUG_LOG_FILE, 'utf-8');
+        const text = readDebugLogTailFromDisk();
         const rows = text.split(/\r?\n/).filter(Boolean);
         return rows.slice(-lines).join('\n') || 'Debug-Log ist leer.';
     } catch (e) {
diff --git a/typescript-version/src/renderer-settings.ts b/typescript-version/src/renderer-settings.ts
index b4dea2b..cebc059 100644
--- a/typescript-version/src/renderer-settings.ts
+++ b/typescript-version/src/renderer-settings.ts
@@ -1,4 +1,13 @@
 let lastRuntimeMetricsOutput = '';
+let lastDebugLogOutput = '';
+
+function canRunSettingsAutoRefresh(): boolean {
+    if (document.hidden) {
+        return false;
+    }
+
+    return document.querySelector('.tab-content.active')?.id === 'settingsTab';
+}
 
 async function connect(): Promise<void> {
     const hasCredentials = Boolean((config.client_id ?? '').toString().trim() && (config.client_secret ?? '').toString().trim());
@@ -142,6 +151,10 @@ function toggleRuntimeMetricsAutoRefresh(enabled: boolean): void {
 
     if (enabled) {
         runtimeMetricsAutoRefreshTimer = window.setInterval(() => {
+            if (!canRunSettingsAutoRefresh()) {
+                return;
+            }
+
             void refreshRuntimeMetrics(false);
         }, 2000);
     }
@@ -245,8 +258,16 @@ async function runPreflight(autoFix = false): Promise<void> {
 async function refreshDebugLog(): Promise<void> {
     const text = await window.api.getDebugLog(250);
     const panel = byId('debugLogOutput');
-    panel.textContent = text;
-    panel.scrollTop = panel.scrollHeight;
+    const keepAtBottom = (panel.scrollHeight - panel.scrollTop - panel.clientHeight) < 20;
+
+    if (text !== lastDebugLogOutput) {
+        panel.textContent = text;
+        lastDebugLogOutput = text;
+    }
+
+    if (keepAtBottom) {
+        panel.scrollTop = panel.scrollHeight;
+    }
 }
 
 function toggleDebugAutoRefresh(enabled: boolean): void {
@@ -257,8 +278,12 @@ function toggleDebugAutoRefresh(enabled: boolean): void {
 
     if (enabled) {
         debugLogAutoRefreshTimer = window.setInterval(() => {
+            if (!canRunSettingsAutoRefresh()) {
+                return;
+            }
+
             void refreshDebugLog();
-        }, 1500);
+        }, 2000);
     }
 }