diff --git a/.travis.yml b/.travis.yml
index ad9c6b8..d18a946 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,7 @@ jdk:
 script:
   - export SRC=$PWD
   - cd $HOME
-  - export TAG=1.6.6
+  - export TAG=1.6.12
   - wget https://github.com/arduino/Arduino/archive/$TAG.zip
   - unzip $TAG.zip
   - rm $TAG.zip
diff --git a/README.md b/README.md
index 7b158c1..16f49b6 100644
--- a/README.md
+++ b/README.md
@@ -11,9 +11,11 @@ Tested with the following Arduino IDE versions: 1.6.5-r2,
 ## Installation
 - Make sure you use one of the supported versions of Arduino IDE and have ESP8266 core installed.
 - Download the tool archive from [releases page](https://github.com/esp8266/arduino-esp8266fs-plugin/releases/latest).
-- In your Arduino sketchbook directory, create tools directory if it doesn't exist yet.
-- Unpack the tool into tools directory (the path will look like `<home_dir>/Arduino/tools/ESP8266FS/tool/esp8266fs.jar)`.
-- Restart Arduino IDE.
+- In your Arduino sketchbook directory, create `tools` directory if it doesn't exist yet. You can find the location of your sketchbook directory in the Arduino IDE at **File > Preferences > Sketchbook location**.
+- Unpack the tool into `tools` directory (the path will look like `<sketchbook directory>/tools/ESP8266FS/tool/esp8266fs.jar)`.
+- Restart Arduino IDE. 
+
+On OS X and Linux based OSs create the tools directory in ~/Documents/Arduino/ and unpack the files there
 
 ## Usage
 - Open a sketch (or create a new one and save it).
diff --git a/make.sh b/make.sh
index 9a7702e..6d76779 100755
--- a/make.sh
+++ b/make.sh
@@ -19,7 +19,7 @@ echo "lib_path: $lib_path"
 set -e
 
 mkdir -p bin
-javac -target 1.8 -cp "$pde_path:$core_path:$lib_path" \
+javac -target 11 -cp "$pde_path:$core_path:$lib_path" \
       -d bin src/ESP8266FS.java
 
 pushd bin
diff --git a/src/ESP8266FS.java b/src/ESP8266FS.java
index 5971267..81b55ef 100644
--- a/src/ESP8266FS.java
+++ b/src/ESP8266FS.java
@@ -40,7 +40,6 @@
 import processing.app.BaseNoGui;
 import processing.app.Platform;
 import processing.app.Sketch;
-import processing.app.SketchData;
 import processing.app.tools.Tool;
 import processing.app.helpers.ProcessUtils;
 import processing.app.debug.TargetPlatform;
@@ -112,36 +111,45 @@ public void run() {
   }
 
   private String getBuildFolderPath(Sketch s) {
+    // first of all try the getBuildPath() function introduced with IDE 1.6.12
+    // see commit arduino/Arduino#fd1541eb47d589f9b9ea7e558018a8cf49bb6d03
     try {
-      File buildFolder = FileUtils.createTempFolder("build", DigestUtils.md5Hex(s.getMainFilePath()) + ".spiffs");
-      DeleteFilesOnShutdown.add(buildFolder);
-      return buildFolder.getAbsolutePath();
+      String buildpath = s.getBuildPath().getAbsolutePath();
+      return buildpath;
     }
-    catch (IOException e) {
-      editor.statusError(e);
+    catch (IOException er) {
+       editor.statusError(er);
     }
-    catch (NoSuchMethodError e) {
-      // Arduino 1.6.5 doesn't have FileUtils.createTempFolder
-      // String buildPath = BaseNoGui.getBuildFolder().getAbsolutePath();
-      java.lang.reflect.Method method;
+    catch (Exception er) {
       try {
-        method = BaseNoGui.class.getMethod("getBuildFolder");
-        File f = (File) method.invoke(null);
-        return f.getAbsolutePath();
-      } catch (SecurityException ex) {
-        editor.statusError(ex);
-      } catch (IllegalAccessException ex) {
-        editor.statusError(ex);
-      } catch (InvocationTargetException ex) {
-        editor.statusError(ex);
-      } catch (NoSuchMethodException ex) {
-        editor.statusError(ex);
+        File buildFolder = FileUtils.createTempFolder("build", DigestUtils.md5Hex(s.getMainFilePath()) + ".tmp");
+        return buildFolder.getAbsolutePath();
+      }
+      catch (IOException e) {
+        editor.statusError(e);
+      }
+      catch (Exception e) {
+        // Arduino 1.6.5 doesn't have FileUtils.createTempFolder
+        // String buildPath = BaseNoGui.getBuildFolder().getAbsolutePath();
+        java.lang.reflect.Method method;
+        try {
+          method = BaseNoGui.class.getMethod("getBuildFolder");
+          File f = (File) method.invoke(null);
+          return f.getAbsolutePath();
+        } catch (SecurityException ex) {
+          editor.statusError(ex);
+        } catch (IllegalAccessException ex) {
+          editor.statusError(ex);
+        } catch (InvocationTargetException ex) {
+          editor.statusError(ex);
+        } catch (NoSuchMethodException ex) {
+          editor.statusError(ex);
+        }
       }
     }
     return "";
   }
 
-
   private long getIntPref(String name){
     String data = BaseNoGui.getBoardPreferences().get(name);
     if(data == null || data.contentEquals("")) return 0;
@@ -150,7 +158,7 @@ private long getIntPref(String name){
   }
 
   private void createAndUpload(){
-    if(!PreferencesData.get("target_platform").contentEquals("esp8266") && !PreferencesData.get("target_platform").contentEquals("esp31b") && !PreferencesData.get("target_platform").contentEquals("ESP31B")){
+    if(!PreferencesData.get("target_platform").contentEquals("esp8266")){
       System.err.println();
       editor.statusError("SPIFFS Not Supported on "+PreferencesData.get("target_platform"));
       return;
@@ -200,6 +208,8 @@ private void createAndUpload(){
     File espota = new File(platform.getFolder()+"/tools");
     File esptool = new File(platform.getFolder()+"/tools");
     String serialPort = PreferencesData.get("serial.port");
+    String pythonCmd = PreferencesData.get("runtime.os").contentEquals("windows") ? "python3.exe" : "python3";
+    String uploadCmd = "";
     
     //make sure the serial port or IP is defined
     if (serialPort == null || serialPort.isEmpty()) {
@@ -208,6 +218,22 @@ private void createAndUpload(){
       return;
     }
 
+    // Find upload.py, don't fail if not present for backwards compat
+    File uploadPyFile = new File(platform.getFolder()+"/tools", "upload.py");
+    if (uploadPyFile.exists() && uploadPyFile.isFile()) {
+      uploadCmd = uploadPyFile.getAbsolutePath();
+    }
+    // Find python.exe if present, don't fail if not found for backwards compat
+    String[] paths = { platform.getFolder()+"/tools", platform.getFolder()+"/tools/python3", PreferencesData.get("runtime.tools.python3.path") };
+    for (String s: paths) {
+      File toolPyFile = new File(s, pythonCmd);
+      if (toolPyFile.exists() && toolPyFile.isFile() && toolPyFile.canExecute()) {
+        pythonCmd = toolPyFile.getAbsolutePath();
+        break;
+      }
+    }
+    // pythonCmd now points to either an installed exe with full path or just plain "python3(.exe)"
+
     //find espota if IP else find esptool
     if(serialPort.split("\\.").length == 4){
       isNetwork = true;
@@ -225,7 +251,7 @@ private void createAndUpload(){
         esptool = new File(platform.getFolder()+"/tools/esptool", esptoolCmd);
         if(!esptool.exists()){
           esptool = new File(PreferencesData.get("runtime.tools.esptool.path"), esptoolCmd);
-          if (!esptool.exists()) {
+          if (!esptool.exists() && uploadCmd.isEmpty()) {
               System.err.println();
               editor.statusError("SPIFFS Error: esptool not found!");
               return;
@@ -270,10 +296,10 @@ private void createAndUpload(){
     }
 
     editor.statusNotice("SPIFFS Creating Image...");
-    System.out.println("[SPIFFS] data   : "+dataPath);
-    System.out.println("[SPIFFS] size   : "+((spiEnd - spiStart)/1024));
-    System.out.println("[SPIFFS] page   : "+spiPage);
-    System.out.println("[SPIFFS] block  : "+spiBlock);
+    System.out.println("[SPIFFS] data    : "+dataPath);
+    System.out.println("[SPIFFS] size    : "+((spiEnd - spiStart)/1024));
+    System.out.println("[SPIFFS] page    : "+spiPage);
+    System.out.println("[SPIFFS] block   : "+spiBlock);
 
     try {
       if(listenOnProcess(new String[]{toolPath, "-c", dataPath, "-p", spiPage+"", "-b", spiBlock+"", "-s", (spiEnd - spiStart)+"", imagePath}) != 0){
@@ -288,25 +314,27 @@ private void createAndUpload(){
     }
 
     editor.statusNotice("SPIFFS Uploading Image...");
-    System.out.println("[SPIFFS] upload : "+imagePath);
+    System.out.println("[SPIFFS] upload  : "+imagePath);
     
     if(isNetwork){
-      String pythonCmd;
-      if(PreferencesData.get("runtime.os").contentEquals("windows"))
-          pythonCmd = "python.exe";
-      else
-          pythonCmd = "python";
-      
-      System.out.println("[SPIFFS] IP     : "+serialPort);
+      System.out.println("[SPIFFS] IP       : "+serialPort);
       System.out.println();
       sysExec(new String[]{pythonCmd, espota.getAbsolutePath(), "-i", serialPort, "-s", "-f", imagePath});
     } else {
-      System.out.println("[SPIFFS] address: "+uploadAddress);
-      System.out.println("[SPIFFS] reset  : "+resetMethod);
-      System.out.println("[SPIFFS] port   : "+serialPort);
-      System.out.println("[SPIFFS] speed  : "+uploadSpeed);
+      System.out.println("[SPIFFS] address  : "+uploadAddress);
+      System.out.println("[SPIFFS] reset    : "+resetMethod);
+      System.out.println("[SPIFFS] port     : "+serialPort);
+      System.out.println("[SPIFFS] speed    : "+uploadSpeed);
+      if (!uploadCmd.isEmpty()) {
+        System.out.println("[SPIFFS] python   : "+pythonCmd);
+        System.out.println("[SPIFFS] uploader : "+uploadCmd);
+      }
       System.out.println();
-      sysExec(new String[]{esptool.getAbsolutePath(), "-cd", resetMethod, "-cb", uploadSpeed, "-cp", serialPort, "-ca", uploadAddress, "-cf", imagePath});
+      if (!uploadCmd.isEmpty()) {
+        sysExec(new String[]{pythonCmd, uploadCmd, "--chip", "esp8266", "--port", serialPort, "--baud", uploadSpeed, "write_flash", uploadAddress, imagePath});
+      } else {
+        sysExec(new String[]{esptool.getAbsolutePath(), "-cd", resetMethod, "-cb", uploadSpeed, "-cp", serialPort, "-ca", uploadAddress, "-cf", imagePath});
+      }
     }
   }