diff --git a/BusyMirror.xcodeproj/project.pbxproj b/BusyMirror.xcodeproj/project.pbxproj
index 0592ac4..e3fe770 100644
--- a/BusyMirror.xcodeproj/project.pbxproj
+++ b/BusyMirror.xcodeproj/project.pbxproj
@@ -410,7 +410,7 @@
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 5;
+				CURRENT_PROJECT_VERSION = 6;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = BusyMirror/Info.plist;
@@ -421,7 +421,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 1.2.3;
+				MARKETING_VERSION = 1.2.4;
 				PRODUCT_BUNDLE_IDENTIFIER = com.cqrenet.BusyMirror;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				REGISTER_APP_GROUPS = YES;
@@ -440,7 +440,7 @@
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "-";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 5;
+				CURRENT_PROJECT_VERSION = 6;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = BusyMirror/Info.plist;
@@ -451,7 +451,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 1.2.3;
+				MARKETING_VERSION = 1.2.4;
 				PRODUCT_BUNDLE_IDENTIFIER = com.cqrenet.BusyMirror;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				REGISTER_APP_GROUPS = YES;
diff --git a/BusyMirror/ContentView.swift b/BusyMirror/ContentView.swift
index 630c7ad..26132b3 100644
--- a/BusyMirror/ContentView.swift
+++ b/BusyMirror/ContentView.swift
@@ -550,7 +550,7 @@ struct ContentView: View {
                         }
                     }
                 }
-                .disabled(isRunning || targetSelections.isEmpty || calendars.isEmpty)
+                .disabled(isRunning || calendars.isEmpty || (routes.isEmpty && targetSelections.isEmpty))
 
                 Button("Cleanup Placeholders") {
                     if writeEnabled {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d9e0109..547f0fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,11 @@
 # Changelog
+# Changelog
 
 All notable changes to BusyMirror will be documented in this file.
 
+## [1.2.4] - 2025-10-10
+- Fix: enable “Mirror Now” when Routes are defined even if no Source/Targets are checked in the main window. Button now enables if either routes exist or a manual selection is present.
+
 ## [1.2.3] - 2025-10-10
 - Fix: reliably save and restore settings between runs via autosave of key options and restoration of source/target selections by persistent IDs.
 - UX: persist Source and Target selections; rebuild indices on launch so UI matches saved IDs.
@@ -15,4 +19,3 @@ All notable changes to BusyMirror will be documented in this file.
 
 ## [1.2.0] - 2024-09-29
 - Feature: multi-route mirroring, overlap modes, merge gaps, work hours filter, CLI support, export/import settings.
-
diff --git a/ReleaseNotes-1.2.4.md b/ReleaseNotes-1.2.4.md
new file mode 100644
index 0000000..554b414
--- /dev/null
+++ b/ReleaseNotes-1.2.4.md
@@ -0,0 +1,11 @@
+# BusyMirror 1.2.4 — 2025-10-10
+
+Bugfix release improving route-driven mirroring.
+
+Fixes
+- Mirror Now is enabled when routes are defined, even if nothing is checked in the main window. This allows fully route-driven runs without requiring a temporary manual selection.
+
+Build
+- `make build-release`
+- `make package` → BusyMirror-1.2.4-macOS.zip and .sha256
+