diff --git a/Commands/SendToMarsEditCommand.swift b/Commands/SendToMarsEditCommand.swift
index b48662ac4..ca1e29d81 100644
--- a/Commands/SendToMarsEditCommand.swift
+++ b/Commands/SendToMarsEditCommand.swift
@@ -8,7 +8,7 @@
 
 import Foundation
 
-struct SendToMarsEditCommand {
+final class SendToMarsEditCommand: SendToCommand {
 
 	func canSendObject(_ object: Any?) -> Bool {
 
diff --git a/Commands/SendToMicroBlogCommand.swift b/Commands/SendToMicroBlogCommand.swift
index 1c80fc9a2..8260799dc 100644
--- a/Commands/SendToMicroBlogCommand.swift
+++ b/Commands/SendToMicroBlogCommand.swift
@@ -6,26 +6,37 @@
 //  Copyright © 2018 Ranchero Software. All rights reserved.
 //
 
-import Foundation
+import Cocoa
 
 // Not undoable.
 
-struct SendToMicroBlogCommand: SendToCommand {
+final class SendToMicroBlogCommand: SendToCommand {
+
+	private let bundleID = "blog.micro.mac"
+	private var appExists = false
+
+	init() {
+
+		self.appExists = appExistsOnDisk(bundleID)
+		NotificationCenter.default.addObserver(self, selector: #selector(appDidBecomeActive(_:)), name: NSApplication.didBecomeActiveNotification, object: nil)
+	}
 
 	func canSendObject(_ object: Any?) -> Bool {
 
+		if !appExists {
+			return false
+		}
 		return false
 	}
 	
 	func sendObject(_ object: Any?) {
 
 	}
-}
 
-private extension SendToMicroBlogCommand {
+	@objc func appDidBecomeActive(_ note: Notification) {
 
-	func appExists() {
-
-		
+		self.appExists = appExistsOnDisk(bundleID)
 	}
 }
+
+