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diff --git a/Deliverables/sprint-13/design-documentation.pdf b/Deliverables/sprint-13/design-documentation.pdf
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diff --git a/Deliverables/sprint-13/user-documentation.pdf b/Deliverables/sprint-13/user-documentation.pdf
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diff --git a/GUI/src/main/kotlin/ui/components/general/ProjectManager.kt b/GUI/src/main/kotlin/ui/components/general/ProjectManager.kt
index 5381f310..65433f29 100644
--- a/GUI/src/main/kotlin/ui/components/general/ProjectManager.kt
+++ b/GUI/src/main/kotlin/ui/components/general/ProjectManager.kt
@@ -36,10 +36,10 @@ fun ProjectMenu(
     state: MutableState<AppState>,
     modifier: Modifier = Modifier,
 ) {
-    var errorDialogText = remember { mutableStateOf<String?>(null) }
+    val errorDialogText = remember { mutableStateOf<String?>(null) }
     var expanded by remember { mutableStateOf(false) }
     val padding = 8.dp
-    var showConfirmationDialog = remember { mutableStateOf(false) }
+    val showConfirmationDialog = remember { mutableStateOf(false) }
 
     if (errorDialogText.value != null) {
         ErrorDialog(onCloseRequest = { errorDialogText.value = null }, text = errorDialogText.value!!)
@@ -88,7 +88,7 @@ fun ProjectMenu(
                     Text("Save Project", fontSize = MaterialTheme.typography.bodyMedium.fontSize)
                 },
                 onClick = {
-                    openFileSaverAndGetPath(state.value.saveProjectPath) { path -> handleSaveProject(state, path) }
+                    openFileSaverAndGetPath(state.value.saveProjectPath) { path -> handleSaveProject(state, path, errorDialogText) }
                     expanded = false
                 },
                 enabled = state.value.screen == Screen.DiffScreen,
@@ -152,12 +152,19 @@ fun handleOpenProject(
 fun handleSaveProject(
     state: MutableState<AppState>,
     path: String,
+    saveError: MutableState<String?>,
 ) {
     var savePath = path
+
     // add .mkv extension if not present
     if (!savePath.endsWith(".mkv")) {
         savePath = "$savePath.mkv"
     }
+
+    if (state.value.outputPath == savePath) {
+        saveError.value = "The project cannot be saved to the same location as the loaded project. Please choose a different location."
+        return
+    }
     // set save path
     state.value.saveProjectPath = savePath
 
diff --git a/GUI/src/main/kotlin/ui/screens/DiffScreen.kt b/GUI/src/main/kotlin/ui/screens/DiffScreen.kt
index 42049ca3..8322e681 100644
--- a/GUI/src/main/kotlin/ui/screens/DiffScreen.kt
+++ b/GUI/src/main/kotlin/ui/screens/DiffScreen.kt
@@ -54,12 +54,12 @@ import java.io.File
 @Composable
 fun DiffScreen(state: MutableState<AppState>) {
     // create the navigator, which implements the jumping logic
-    val navigator = remember { FrameNavigation(state) }
+    val navigator = FrameNavigation(state)
     val showConfirmationDialog = remember { mutableStateOf(false) }
     val frameGrabber = FrameGrabber(state)
     val thumbnailGrabber = FrameGrabber(state)
 
-    DisposableEffect(Unit) {
+    DisposableEffect(state.value) {
         onDispose {
             frameGrabber.close()
             thumbnailGrabber.close()
@@ -97,7 +97,23 @@ fun DiffScreen(state: MutableState<AppState>) {
                 Row {
                     IconButton(
                         modifier = Modifier.padding(8.dp),
-                        content = { Icon(Icons.Default.ArrowBack, "back button") },
+                        content = {
+                            Icon(Icons.Default.ArrowBack, "back button")
+                            // #####   Confirmation Dialog   #####
+                            ConfirmationPopup(
+                                showDialog = showConfirmationDialog.value,
+                                onConfirm = {
+                                    state.value =
+                                        state.value.copy(
+                                            screen = Screen.SelectVideoScreen,
+                                            hasUnsavedChanges = false,
+                                        )
+                                },
+                                onCancel = { showConfirmationDialog.value = false },
+                                text =
+                                    "Are you sure you want to go back to the main screen without saving the Difference Video?",
+                            )
+                        },
                         onClick = {
                             if (state.value.hasUnsavedChanges) {
                                 showConfirmationDialog.value = true
@@ -170,18 +186,4 @@ fun DiffScreen(state: MutableState<AppState>) {
         // #####   Navigation   #####
         NavigationButtons(navigator, Modifier.weight(1f), Modifier.weight(0.10f))
     }
-    // #####   Confirmation Dialog   #####
-    ConfirmationPopup(
-        showDialog = showConfirmationDialog.value,
-        onConfirm = {
-            state.value =
-                state.value.copy(
-                    screen = Screen.SelectVideoScreen,
-                    hasUnsavedChanges = false,
-                )
-        },
-        onCancel = { showConfirmationDialog.value = false },
-        text =
-            "Are you sure you want to go back to the main screen without saving the Difference Video?",
-    )
 }