diff --git a/README.md b/README.md
index 53e51e4..aa5ecd1 100755
--- a/README.md
+++ b/README.md
@@ -46,8 +46,16 @@ if ($update->checkUpdate() === false)
 
 // Check if new update is available
 if ($update->newVersionAvailable()) {
+    echo 'New Version: ' . $update->getLatestVersion();
+    // Simulate or install?
+    $simulate = true;
 	//Install new update
-	echo 'New Version: ' . $update->getLatestVersion();
+    $result = $update->update($simulate);
+    if ($result === true) {
+        echo 'Update simulation successful<br>';
+    } else {
+        echo 'Update simulation failed: ' . $result . '!<br>';
+    }
 } else {
 	// No new update
 	echo 'Your application is up to date';
diff --git a/example/client/update/index.php b/example/client/update/index.php
index 7634cd1..6463833 100755
--- a/example/client/update/index.php
+++ b/example/client/update/index.php
@@ -13,36 +13,63 @@
 // $update->setCache(new Desarrolla2\Cache\Adapter\File(__DIR__ . '/cache'), 3600);
 
 //Check for a new update
-if ($update->checkUpdate() === false)
-	die('Could not check for updates! See log file for details.');
+if ($update->checkUpdate() === false) {
+    die('Could not check for updates! See log file for details.');
+}
 
 if ($update->newVersionAvailable()) {
-	//Install new update
-	echo 'New Version: ' . $update->getLatestVersion() . '<br>';
-	echo 'Installing Updates: <br>';
-	echo '<pre>';
-	var_dump(array_map(function($version) {
-		return (string) $version;
-	}, $update->getVersionsToUpdate()));
-	echo '</pre>';
-
-	// This call will only simulate an update.
-	// Set the first argument (simulate) to "false" to install the update
-	// i.e. $update->update(false);
-	$result = $update->update();
-	if ($result === true) {
-		echo 'Update simulation successful<br>';
-	} else {
-		echo 'Update simulation failed: ' . $result . '!<br>';
-
-		if ($result = AutoUpdate::ERROR_SIMULATE) {
-			echo '<pre>';
-			var_dump($update->getSimulationResults());
-			echo '</pre>';
-		}
-	}
+    //Install new update
+    echo 'New Version: ' . $update->getLatestVersion() . '<br>';
+    echo 'Installing Updates: <br>';
+    echo '<pre>';
+    var_dump(array_map(function ($version) {
+        return (string) $version;
+    }, $update->getVersionsToUpdate()));
+    echo '</pre>';
+
+    // Optional - empty log file
+    $f = @fopen(__DIR__ . '/update.log', 'r+');
+    if ($f !== false) {
+        ftruncate($f, 0);
+        fclose($f);
+    }
+
+    // Optional Callback function - on each version update
+    function eachUpdateFinishCallback($updatedVersion)
+    {
+        echo '<h3>CALLBACK for version ' . $updatedVersion . '</h3>';
+    }
+    $update->onEachUpdateFinish('eachUpdateFinishCallback');
+
+    // Optional Callback function - on each version update
+    function onAllUpdateFinishCallbacks($updatedVersions)
+    {
+        echo '<h3>CALLBACK for all updated versions:</h3>';
+        echo '<ul>';
+        foreach ($updatedVersions as $v) {
+            echo '<li>' . $v . '</li>';
+        }
+        echo '</ul>';
+    }
+    $update->setOnAllUpdateFinishCallbacks('onAllUpdateFinishCallbacks');
+
+    // This call will only simulate an update.
+    // Set the first argument (simulate) to "false" to install the update
+    // i.e. $update->update(false);
+    $result = $update->update();
+    if ($result === true) {
+        echo 'Update simulation successful<br>';
+    } else {
+        echo 'Update simulation failed: ' . $result . '!<br>';
+
+        if ($result = AutoUpdate::ERROR_SIMULATE) {
+            echo '<pre>';
+            var_dump($update->getSimulationResults());
+            echo '</pre>';
+        }
+    }
 } else {
-	echo 'Current Version is up to date<br>';
+    echo 'Current Version is up to date<br>';
 }
 
 echo 'Log:<br>';
diff --git a/src/AutoUpdate.php b/src/AutoUpdate.php
index 25e94f6..b690b54 100755
--- a/src/AutoUpdate.php
+++ b/src/AutoUpdate.php
@@ -701,14 +701,22 @@ protected function _install($updateFile, $simulateInstall, $version)
         $this->_log->addNotice(sprintf('Trying to install update "%s"', $updateFile));
 
         // Check if install should be simulated
-        if ($simulateInstall && !$this->_simulateInstall($updateFile)) {
-            $this->_log->addCritical('Simulation of update process failed!');
+        if ($simulateInstall) {
+            if ($this->_simulateInstall($updateFile)) {
+                $this->_log->addNotice(sprintf('Simulation of update "%s" process succeeded', $version));
+
+                return true;
+            }
+
+            $this->_log->addCritical(sprintf('Simulation of update  "%s" process failed!', $version));
 
             return self::ERROR_SIMULATE;
         }
 
         clearstatcache();
 
+        // Install only if simulateInstall === false
+
         // Check if zip file could be opened
         $zip = zip_open($updateFile);
         if (!is_resource($zip)) {