diff --git a/src/classes/metrics.py b/src/classes/metrics.py
index 1df45ef2d3..b103e72206 100644
--- a/src/classes/metrics.py
+++ b/src/classes/metrics.py
@@ -173,8 +173,6 @@ def send_metric(params):
             # Send metric HTTP data
             try:
                 r = requests.get(url, headers={"user-agent": user_agent})
-                log.info("Track metric: [%s] %s | (%s bytes)" % (r.status_code, r.url, len(r.content)))
-
             except Exception:
                 log.warning("Failed to track metric", exc_info=1)
 
diff --git a/src/windows/main_window.py b/src/windows/main_window.py
index 46f9ddb17d..94cd9c74ea 100644
--- a/src/windows/main_window.py
+++ b/src/windows/main_window.py
@@ -166,6 +166,12 @@ def closeEvent(self, event):
         # Stop threads
         self.StopSignal.emit()
 
+        # Stop thumbnail server thread
+        self.http_server_thread.kill()
+
+        # Stop ZMQ polling thread
+        get_app().logger_libopenshot.kill()
+
         # Process any queued events
         QCoreApplication.processEvents()
 
@@ -2079,19 +2085,7 @@ def actionSimple_View_trigger(self):
 
         # Set initial size of docks
         simple_state = "".join([
-            "AAAA/wAAAAD9AAAAAwAAAAAAAAEnAAAC3/wCAAAAA/wAAAJeAAAApwAAAAAA////+gAAAAACAAAAAfsAAAA"
-            "YAGQAbwBjAGsASwBlAHkAZgByAGEAbQBlAAAAAAD/////AAAAAAAAAAD7AAAAHABkAG8AYwBrAFAAcgBvAH"
-            "AAZQByAHQAaQBlAHMAAAAAJwAAAt8AAAChAP////sAAAAYAGQAbwBjAGsAVAB1AHQAbwByAGkAYQBsAgAAA"
-            "AAAAAAAAAAAyAAAAGQAAAABAAABHAAAAUD8AgAAAAH7AAAAGABkAG8AYwBrAEsAZQB5AGYAcgBhAG0AZQEA"
-            "AAFYAAAAFQAAAAAAAAAAAAAAAgAABEYAAALY/AEAAAAC/AAAAAAAAANnAAAA+gD////8AgAAAAL8AAAAJwA"
-            "AAcAAAACvAP////wBAAAAAvwAAAAAAAABFQAAAHsA////+gAAAAACAAAAA/sAAAASAGQAbwBjAGsARgBpAG"
-            "wAZQBzAQAAAAD/////AAAAkgD////7AAAAHgBkAG8AYwBrAFQAcgBhAG4AcwBpAHQAaQBvAG4AcwEAAAAA/"
-            "////wAAAJIA////+wAAABYAZABvAGMAawBFAGYAZgBlAGMAdABzAQAAAAD/////AAAAkgD////7AAAAEgBk"
-            "AG8AYwBrAFYAaQBkAGUAbwEAAAEbAAACTAAAAEcA////+wAAABgAZABvAGMAawBUAGkAbQBlAGwAaQBuAGU"
-            "BAAAB7QAAARIAAACWAP////wAAANtAAAA2QAAAIIA////+gAAAAECAAAAAvsAAAAiAGQAbwBjAGsAQwBhAH"
-            "AAdABpAG8AbgBFAGQAaQB0AG8AcgAAAAAA/////wAAAJgA////+wAAABQAZABvAGMAawBFAG0AbwBqAGkAc"
-            "wEAAADFAAACOgAAAJIA////AAAERgAAAAEAAAABAAAAAgAAAAEAAAAC/AAAAAEAAAACAAAAAQAAAA4AdABv"
-            "AG8AbABCAGEAcgEAAAAA/////wAAAAAAAAAA"
+            "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"
         ])
         self.restoreState(qt_types.str_to_bytes(simple_state))
         QCoreApplication.processEvents()
@@ -2633,7 +2627,6 @@ def clearSelections(self):
 
     def foundCurrentVersion(self, version):
         """Handle the callback for detecting the current version on openshot.org"""
-        log.info('foundCurrentVersion: Found the latest version: %s' % version)
         _ = get_app()._tr
 
         # Compare versions (alphabetical compare of version strings should work fine)
@@ -2654,6 +2647,10 @@ def foundCurrentVersion(self, version):
             updateButton.setToolButtonStyle(Qt.ToolButtonTextBesideIcon)
             self.toolBar.addWidget(updateButton)
 
+        # Initialize sentry exception tracing (now that we know the current version)
+        from classes import sentry
+        sentry.init_tracing()
+
     def moveEvent(self, event):
         """ Move tutorial dialogs also (if any)"""
         QMainWindow.moveEvent(self, event)
@@ -2823,17 +2820,25 @@ def __init__(self, *args, mode=None):
 
         # Set unique install id (if blank)
         if not s.get("unique_install_id"):
+            # This is assumed to be the 1st launch
             s.set("unique_install_id", str(uuid4()))
 
             # Track 1st launch metric
             track_metric_screen("initial-launch-screen")
 
+            # Track 1st main screen
+            track_metric_screen("main-screen")
+
+            # Opt-out of metrics tracking on 1st launch (and prompt user)
+            track_metric_screen("metrics-opt-out")
+            s.set("send_metrics", False)
+        else:
+            # Only track main screen
+            track_metric_screen("main-screen")
+
         # Set unique id for Sentry
         sentry.set_user({"id": s.get("unique_install_id")})
 
-        # Track main screen
-        track_metric_screen("main-screen")
-
         # Create blank tutorial manager
         self.tutorial_manager = None