diff --git a/mac/Info.plist b/mac/Info.plist
index 57e90cc83..7ea84e718 100644
--- a/mac/Info.plist
+++ b/mac/Info.plist
@@ -201,6 +201,18 @@
 			<key>CFBundleTypeRole</key>
 			<string>Editor</string>
 		</dict>
+		<dict>
+			<key>CFBundleTypeExtensions</key>
+			<array>
+				<string>ny</string>
+			</array>
+			<key>CFBundleTypeIconFile</key>
+			<string>AudacityProject.icns</string>
+			<key>CFBundleTypeName</key>
+			<string>Nyquist Plug-in File</string>
+			<key>CFBundleTypeRole</key>
+			<string>Shell</string>
+		</dict>
 	</array>
 	<key>CFBundleExecutable</key>
 	<string>AUDACITY_EXECUTABLE</string>
diff --git a/src/PluginManager.cpp b/src/PluginManager.cpp
index cd319eb00..b8929593c 100644
--- a/src/PluginManager.cpp
+++ b/src/PluginManager.cpp
@@ -1847,6 +1847,8 @@ bool PluginManager::DropFile(const wxString &fileName)
                ) );
                for (const auto &id : ids)
                   mPlugins[id].SetEnabled(enable);
+               // Make changes to enabled status persist:
+               this->Save();
             }
 
             return true;
diff --git a/src/Project.cpp b/src/Project.cpp
index af9b6feae..47f038024 100644
--- a/src/Project.cpp
+++ b/src/Project.cpp
@@ -461,16 +461,6 @@ public:
 
          for (const auto &name : sortednames) {
 
-#ifdef EXPERIMENTAL_DRAG_DROP_PLUG_INS
-            // Is it a plug-in?
-            if (PluginManager::Get().DropFile(name)) {
-               mProject->RebuildAllMenuBars();
-               continue;
-            }
-
-            // No, so import.
-#endif
-
             if (Importer::IsMidi(name))
                AudacityProject::DoImportMIDI(mProject, name);
             else
@@ -3043,12 +3033,24 @@ void AudacityProject::OpenFile(const wxString &fileNameArg, bool addtohistory)
    // FIXME: //v Surely we could be smarter about this, like checking much earlier that this is a .aup file.
    if (temp.Mid(0, 6) != wxT("<?xml ")) {
       // If it's not XML, try opening it as any other form of audio
-      if (Importer::IsMidi(fileName))
-         DoImportMIDI(this, fileName);
-      else
-         Import(fileName);
 
-      ZoomAfterImport(nullptr);
+#ifdef EXPERIMENTAL_DRAG_DROP_PLUG_INS
+      // Is it a plug-in?
+      if (PluginManager::Get().DropFile(fileName)) {
+         this->RebuildAllMenuBars();
+      }
+      else
+      // No, so import.
+#endif
+
+      {
+         if (Importer::IsMidi(fileName))
+            DoImportMIDI(this, fileName);
+         else
+            Import(fileName);
+
+         ZoomAfterImport(nullptr);
+      }
 
       return;
    }