diff --git a/FruitMachine/AppleI/AppleI.swift b/FruitMachine/AppleI/AppleI.swift
index 6cc7e18..ddc9f6b 100644
--- a/FruitMachine/AppleI/AppleI.swift
+++ b/FruitMachine/AppleI/AppleI.swift
@@ -57,16 +57,11 @@ class AppleI: NSObject {
         CPU.sharedInstance.memoryInterface.read_overrides.append(PIAOverrides.readKBDCR)
     }
     
-    func runFrame() {
-        let startTime = CFAbsoluteTimeGetCurrent()
-        
+    func runFrame() {        
         CPU.sharedInstance.cycles = 0
         CPU.sharedInstance.cyclesInBatch = AppleI.CYCLES_PER_BATCH
         CPU.sharedInstance.runCyclesBatch()
         
-        let timeElapsed = CFAbsoluteTimeGetCurrent() - startTime
-        print("Time elapsed for runFrame: \(timeElapsed) s.")
-        
         //update the video display
         CVPixelBufferLockBaseAddress(emulatorViewDelegate.pixels!, CVPixelBufferLockFlags(rawValue: 0))
         let pixelBase = CVPixelBufferGetBaseAddress(emulatorViewDelegate.pixels!)
diff --git a/FruitMachine/PreferencesWindow.xib b/FruitMachine/PreferencesWindow.xib
index 1f61b04..97b6d32 100644
--- a/FruitMachine/PreferencesWindow.xib
+++ b/FruitMachine/PreferencesWindow.xib
@@ -17,7 +17,7 @@
         <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
         <customObject id="-3" userLabel="Application" customClass="NSObject"/>
         <window title="Window" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" oneShot="NO" releasedWhenClosed="NO" animationBehavior="default" id="F0z-JX-Cv5">
-            <windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES" resizable="YES"/>
+            <windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES"/>
             <windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES"/>
             <rect key="contentRect" x="196" y="240" width="600" height="270"/>
             <rect key="screenRect" x="0.0" y="0.0" width="1916" height="936"/>
@@ -32,7 +32,7 @@
                         <tabViewItems>
                             <tabViewItem label="General" identifier="1" id="nQU-pA-pvF">
                                 <view key="view" id="iK8-x4-ay0">
-                                    <rect key="frame" x="10" y="33" width="554" height="208"/>
+                                    <rect key="frame" x="10" y="33" width="137" height="0.0"/>
                                     <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                 </view>
                             </tabViewItem>
@@ -102,6 +102,9 @@
                                                 <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                                 <font key="font" metaFont="system"/>
                                             </buttonCell>
+                                            <connections>
+                                                <action selector="btn_click_Monitor:" target="-2" id="3Je-Tb-j64"/>
+                                            </connections>
                                         </button>
                                         <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="NzD-Hf-wKo">
                                             <rect key="frame" x="421" y="149" width="81" height="32"/>
@@ -110,6 +113,9 @@
                                                 <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                                 <font key="font" metaFont="system"/>
                                             </buttonCell>
+                                            <connections>
+                                                <action selector="btn_click_Character:" target="-2" id="eI5-vI-eb4"/>
+                                            </connections>
                                         </button>
                                         <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="cWc-WS-hPu">
                                             <rect key="frame" x="421" y="117" width="81" height="32"/>
@@ -118,6 +124,9 @@
                                                 <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                                 <font key="font" metaFont="system"/>
                                             </buttonCell>
+                                            <connections>
+                                                <action selector="btn_click_BASIC:" target="-2" id="DbT-4k-anJ"/>
+                                            </connections>
                                         </button>
                                     </subviews>
                                 </view>
diff --git a/FruitMachine/PreferencesWindowController.swift b/FruitMachine/PreferencesWindowController.swift
index 9adb100..1c9eb1b 100644
--- a/FruitMachine/PreferencesWindowController.swift
+++ b/FruitMachine/PreferencesWindowController.swift
@@ -36,8 +36,62 @@ class PreferencesWindowController: NSWindowController {
         }
     }
     
+    func windowWillClose(_ notification: Notification) {
+        defaults.set(path_ROMMonitor.stringValue, forKey: "path_ROMMonitor")
+        defaults.set(path_ROMCharacter.stringValue, forKey: "path_ROMCharacter")
+        defaults.set(path_ROMBasic.stringValue, forKey: "path_ROMBasic")
+        
+        defaults.synchronize()
+    }
+    
     override var windowNibName : NSNib.Name? {
         return NSNib.Name(rawValue: "PreferencesWindow")
     }
     
+    @IBAction func btn_click_Monitor(_ sender: NSButton) {
+        let picker = NSOpenPanel()
+        
+        picker.title = "Select your Monitor ROM (apple1.rom)"
+        picker.showsHiddenFiles = false
+        picker.canChooseFiles = true
+        picker.canChooseDirectories = false
+        picker.allowsMultipleSelection = false
+        picker.allowedFileTypes = ["rom"]
+        
+        if(picker.runModal() == .OK) {
+            path_ROMMonitor.stringValue = picker.url!.path
+        }
+    }
+    
+    @IBAction func btn_click_Character(_ sender: NSButton) {
+        let picker = NSOpenPanel()
+        
+        picker.title = "Select your Monitor ROM (apple1.vid)"
+        picker.showsHiddenFiles = false
+        picker.canChooseFiles = true
+        picker.canChooseDirectories = false
+        picker.allowsMultipleSelection = false
+        picker.allowedFileTypes = ["vid"]
+        
+        if(picker.runModal() == .OK) {
+            path_ROMCharacter.stringValue = picker.url!.path
+        }
+    }
+    
+    @IBAction func btn_click_BASIC(_ sender: NSButton) {
+        let picker = NSOpenPanel()
+        
+        picker.title = "Select your Monitor ROM (basic.bin)"
+        picker.showsHiddenFiles = false
+        picker.canChooseFiles = true
+        picker.canChooseDirectories = false
+        picker.allowsMultipleSelection = false
+        picker.allowedFileTypes = ["bin"]
+        
+        if(picker.runModal() == .OK) {
+            path_ROMBasic.stringValue = picker.url!.path
+        }
+    }
+    
+    
 }