diff --git a/Builds/MacOSX/HelloWorldDemo.xcodeproj/project.pbxproj b/Builds/MacOSX/HelloWorldDemo.xcodeproj/project.pbxproj
index 0f5ff16..5e8486b 100644
--- a/Builds/MacOSX/HelloWorldDemo.xcodeproj/project.pbxproj
+++ b/Builds/MacOSX/HelloWorldDemo.xcodeproj/project.pbxproj
@@ -18,6 +18,7 @@
 		5C4FFCDF8D6FDF200EC517F5 /* Security.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = A95C42174C07FAA2B2B65C4C /* Security.framework */; };
 		8A4DDBE72A850D4F0032C112 /* libch341eeprom.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 8A4DDBE62A850D190032C112 /* libch341eeprom.a */; };
 		8A4DDBE82A850D660032C112 /* libusb-1.0.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 8A4DDBE52A850BFC0032C112 /* libusb-1.0.a */; };
+		8A92C8982A85735700923F81 /* libfvhex2bin.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 8A1882DE2A85625700E34232 /* libfvhex2bin.a */; };
 		A237F9B254E95B3173479FF5 /* Main.cpp in Sources */ = {isa = PBXBuildFile; fileRef = E7DABA4EA84ACAB407A52BAE /* Main.cpp */; };
 		F7500DD6050381FC1C00196C /* QuartzCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0050B1C17FE29F9C95B64D51 /* QuartzCore.framework */; };
 		FB5FD2A4E19C899FDDF1A2FF /* RecentFilesMenuTemplate.nib in Resources */ = {isa = PBXBuildFile; fileRef = 6FC6928C1E798507B5702338 /* RecentFilesMenuTemplate.nib */; };
@@ -35,6 +36,7 @@
 		5E7B98148BAD54B9201CF2C7 /* juce_core */ = {isa = PBXFileReference; lastKnownFileType = folder; name = juce_core; path = "~/JUCE/modules/juce_core"; sourceTree = "<absolute>"; };
 		6FC6928C1E798507B5702338 /* RecentFilesMenuTemplate.nib */ = {isa = PBXFileReference; lastKnownFileType = file.nib; path = RecentFilesMenuTemplate.nib; sourceTree = SOURCE_ROOT; };
 		800D138984C3A1FF22A52A42 /* juce_gui_basics */ = {isa = PBXFileReference; lastKnownFileType = folder; name = juce_gui_basics; path = "~/JUCE/modules/juce_gui_basics"; sourceTree = "<absolute>"; };
+		8A1882DE2A85625700E34232 /* libfvhex2bin.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; name = libfvhex2bin.a; path = ../../../heck_fv_hex2bin/src/libfvhex2bin.a; sourceTree = "<group>"; };
 		8A4DDBE52A850BFC0032C112 /* libusb-1.0.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; name = "libusb-1.0.a"; path = "../../../../../../../opt/local/lib/libusb-1.0.a"; sourceTree = "<group>"; };
 		8A4DDBE62A850D190032C112 /* libch341eeprom.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; name = libch341eeprom.a; path = ../../../../heck_fvflash/src/libch341eeprom.a; sourceTree = "<group>"; };
 		957408F71F4B186C7A55CAA4 /* juce_events */ = {isa = PBXFileReference; lastKnownFileType = folder; name = juce_events; path = "~/JUCE/modules/juce_events"; sourceTree = "<absolute>"; };
@@ -54,6 +56,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				8A92C8982A85735700923F81 /* libfvhex2bin.a in Frameworks */,
 				50FE42A5C0417BF97C544A26 /* Cocoa.framework in Frameworks */,
 				8A4DDBE72A850D4F0032C112 /* libch341eeprom.a in Frameworks */,
 				58F81FF61B2E3330A4DC84D5 /* Foundation.framework in Frameworks */,
@@ -125,6 +128,7 @@
 		F0AEE2DC91681642918BB3F7 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				8A1882DE2A85625700E34232 /* libfvhex2bin.a */,
 				8A4DDBE62A850D190032C112 /* libch341eeprom.a */,
 				8A4DDBE52A850BFC0032C112 /* libusb-1.0.a */,
 				E1F338292664601BF133048D /* Cocoa.framework */,
@@ -349,11 +353,13 @@
 					"$(HOME)/JUCE/modules",
 					"$(inherited)",
 					/Users/heck/src/heck_fvflash/src,
+					/Users/heck/src/heck_fv_hex2bin/src,
 				);
 				INFOPLIST_FILE = "Info-App.plist";
 				INFOPLIST_PREPROCESS = NO;
 				INSTALL_PATH = "$(HOME)/Applications";
 				LIBRARY_SEARCH_PATHS = (
+					/Users/heck/src/heck_fv_hex2bin/src,
 					/Users/heck/src/heck_fvflash/src,
 					/opt/local/lib,
 				);
@@ -421,11 +427,13 @@
 					"$(HOME)/JUCE/modules",
 					"$(inherited)",
 					/Users/heck/src/heck_fvflash/src,
+					/Users/heck/src/heck_fv_hex2bin/src,
 				);
 				INFOPLIST_FILE = "Info-App.plist";
 				INFOPLIST_PREPROCESS = NO;
 				INSTALL_PATH = "$(HOME)/Applications";
 				LIBRARY_SEARCH_PATHS = (
+					/Users/heck/src/heck_fv_hex2bin/src,
 					/Users/heck/src/heck_fvflash/src,
 					/opt/local/lib,
 				);
diff --git a/Builds/MacOSX/HelloWorldDemo.xcodeproj/project.xcworkspace/xcuserdata/heck.xcuserdatad/UserInterfaceState.xcuserstate b/Builds/MacOSX/HelloWorldDemo.xcodeproj/project.xcworkspace/xcuserdata/heck.xcuserdatad/UserInterfaceState.xcuserstate
index 77d20ea..0cca8d4 100644
Binary files a/Builds/MacOSX/HelloWorldDemo.xcodeproj/project.xcworkspace/xcuserdata/heck.xcuserdatad/UserInterfaceState.xcuserstate and b/Builds/MacOSX/HelloWorldDemo.xcodeproj/project.xcworkspace/xcuserdata/heck.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/Builds/MacOSX/build/Debug/HelloWorldDemo.app/Contents/MacOS/HelloWorldDemo b/Builds/MacOSX/build/Debug/HelloWorldDemo.app/Contents/MacOS/HelloWorldDemo
index e7ffd38..61f7db5 100755
Binary files a/Builds/MacOSX/build/Debug/HelloWorldDemo.app/Contents/MacOS/HelloWorldDemo and b/Builds/MacOSX/build/Debug/HelloWorldDemo.app/Contents/MacOS/HelloWorldDemo differ
diff --git a/Source/HelloWorldDemo.h b/Source/HelloWorldDemo.h
index 2499e2c..ac80a3d 100644
--- a/Source/HelloWorldDemo.h
+++ b/Source/HelloWorldDemo.h
@@ -45,12 +45,15 @@
 *******************************************************************************/
 
 #pragma once
-
+#include <filesystem>
 #include <libch341eeprom.h>
+#include <libfvhex2bin.h>
+
 
 //==============================================================================
 class HelloWorldDemo  : public Component, public juce::FilenameComponentListener
 {
+    
 public:
     int fv1flash_write(std::string &filename) {
         ch341_operation_desc opdesc{};
@@ -80,7 +83,7 @@ public:
                                                      false,                    // is for saving,
                                                      {},                       // browser wildcard suffix,
                                                      {},                       // enforced suffix,
-                                                     "Drop fv-1 program \n\nHere\n\nto upload (bin file)"));  // text when nothing selected
+                                                     "Drop fv-1 program \n\nHere\n\nto upload (hex file)"));  // text when nothing selected
         addAndMakeVisible (fileComp.get());
         fileComp->addListener (this);
 
@@ -140,15 +143,35 @@ public:
     void filenameComponentChanged (juce::FilenameComponent* fileComponentThatHasChanged) override
     {
         if (fileComponentThatHasChanged == fileComp.get()) {
-            std::string filename = fileComp->getCurrentFile().getFullPathName().toStdString();
+            std::string infilename = fileComp->getCurrentFile().getFullPathName().toStdString();
+            std::string uploadfilename = infilename;
+            
+            if(fileComp->getCurrentFile().getFileExtension().toStdString() == ".hex")
+            {
+                std::string outfilename = infilename + ".bin";
+                
+                // Convert
+                status_label.setText("Converting hex2bin...", juce::NotificationType::dontSendNotification);
+                int status = heckfv_hex2bin(infilename.data(), outfilename.data());
+
+                if (status != 0) {
+                    status_label.setColour (Label::textColourId, Colours::red);
+                    status_label.setText("Convert Error: hex2bin conversion failed)", juce::NotificationType::dontSendNotification);
+                    return;
+                }
+                uploadfilename = outfilename;
+            }
+
+            // Upload
             status_label.setText("Uploading...", juce::NotificationType::dontSendNotification);
-            if (fv1flash_write(filename) == 0) {
-                status_label.setColour (Label::textColourId, Colours::green);
-                status_label.setText("Upload Successful", juce::NotificationType::dontSendNotification);
-            } else {
+            if (fv1flash_write(uploadfilename) != 0) {
                 status_label.setColour (Label::textColourId, Colours::red);
                 status_label.setText("Upload Error: fv-1 board not found)", juce::NotificationType::dontSendNotification);
+                return;
             }
+            
+            status_label.setColour (Label::textColourId, Colours::green);
+            status_label.setText("Upload Successful", juce::NotificationType::dontSendNotification);
         }
     }