diff --git a/app/lib/commons-io-2.6.jar b/app/lib/commons-io-2.6.jar
new file mode 100644
index 000000000..00556b119
Binary files /dev/null and b/app/lib/commons-io-2.6.jar differ
diff --git a/arduino-core/lib/commons-io-2.6.jar b/arduino-core/lib/commons-io-2.6.jar
new file mode 100644
index 000000000..00556b119
Binary files /dev/null and b/arduino-core/lib/commons-io-2.6.jar differ
diff --git a/arduino-core/src/cc/arduino/contributions/DownloadableContributionsDownloader.java b/arduino-core/src/cc/arduino/contributions/DownloadableContributionsDownloader.java
index 3e3a7b7ce..170c5c6da 100644
--- a/arduino-core/src/cc/arduino/contributions/DownloadableContributionsDownloader.java
+++ b/arduino-core/src/cc/arduino/contributions/DownloadableContributionsDownloader.java
@@ -33,6 +33,7 @@ import cc.arduino.utils.FileHash;
 import cc.arduino.utils.MultiStepProgress;
 import cc.arduino.utils.Progress;
 import cc.arduino.utils.network.FileDownloader;
+import org.apache.commons.io.FilenameUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import processing.app.BaseNoGui;
@@ -147,13 +148,13 @@ public class DownloadableContributionsDownloader {
   public void downloadIndexAndSignature(MultiStepProgress progress, URL packageIndexUrl, ProgressListener progressListener, SignatureVerifier signatureVerifier) throws Exception {
 
     // Extract the file name from the url
-    String[] urlPathParts = packageIndexUrl.getFile().split("/");
-    File packageIndex = BaseNoGui.indexer.getIndexFile(urlPathParts[urlPathParts.length - 1]);
+    String indexFileName = FilenameUtils.getName(packageIndexUrl.getPath());
+    File packageIndex = BaseNoGui.indexer.getIndexFile(indexFileName);
 
     final String statusText = tr("Downloading platforms index...");
 
     // Create temp files
-    File packageIndexTemp = File.createTempFile(packageIndexUrl.getPath(), ".tmp");
+    File packageIndexTemp = File.createTempFile(indexFileName, ".tmp");
     try {
       // Download package index
       download(packageIndexUrl, packageIndexTemp, progress, statusText, progressListener, true);
@@ -195,10 +196,11 @@ public class DownloadableContributionsDownloader {
 
   public boolean checkSignature(MultiStepProgress progress, URL signatureUrl, ProgressListener progressListener, SignatureVerifier signatureVerifier, String statusText, File fileToVerify) throws Exception {
 
-    File packageIndexSignatureTemp = File.createTempFile(signatureUrl.getPath(), ".tmp");
     // Signature file name
-    String[] urlPathParts = signatureUrl.getFile().split("/");
-    File packageIndexSignature = BaseNoGui.indexer.getIndexFile(urlPathParts[urlPathParts.length - 1]);
+    String signatureFileName = FilenameUtils.getName(signatureUrl.getPath());
+    File packageIndexSignature = BaseNoGui.indexer.getIndexFile(signatureFileName);
+    File packageIndexSignatureTemp = File.createTempFile(signatureFileName, ".tmp");
+
 
     try {
       // Download signature
diff --git a/arduino-core/src/cc/arduino/contributions/GZippedJsonDownloader.java b/arduino-core/src/cc/arduino/contributions/GZippedJsonDownloader.java
index 0eb53fc25..010a0a863 100644
--- a/arduino-core/src/cc/arduino/contributions/GZippedJsonDownloader.java
+++ b/arduino-core/src/cc/arduino/contributions/GZippedJsonDownloader.java
@@ -34,6 +34,7 @@ import cc.arduino.utils.Progress;
 import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
 import org.apache.commons.compress.compressors.gzip.GzipUtils;
 import org.apache.commons.compress.utils.IOUtils;
+import org.apache.commons.io.FilenameUtils;
 
 import java.io.*;
 import java.net.URL;
@@ -54,7 +55,8 @@ public class GZippedJsonDownloader {
   public void download(File tmpFile, Progress progress, String statusText, ProgressListener progressListener) throws Exception {
     File gzipTmpFile = null;
     try {
-      gzipTmpFile = File.createTempFile(new URL(Constants.LIBRARY_INDEX_URL_GZ).getPath(), GzipUtils.getCompressedFilename(tmpFile.getName()));
+      String tmpFileName = FilenameUtils.getName(new URL(Constants.LIBRARY_INDEX_URL_GZ).getPath());
+      gzipTmpFile = File.createTempFile(tmpFileName, GzipUtils.getCompressedFilename(tmpFile.getName()));
       // remove eventual leftovers from previous downloads
       Files.deleteIfExists(gzipTmpFile.toPath());
 
diff --git a/arduino-core/src/cc/arduino/contributions/libraries/LibraryInstaller.java b/arduino-core/src/cc/arduino/contributions/libraries/LibraryInstaller.java
index 94c16086b..a9722c2ca 100644
--- a/arduino-core/src/cc/arduino/contributions/libraries/LibraryInstaller.java
+++ b/arduino-core/src/cc/arduino/contributions/libraries/LibraryInstaller.java
@@ -36,6 +36,7 @@ import cc.arduino.contributions.GZippedJsonDownloader;
 import cc.arduino.contributions.ProgressListener;
 import cc.arduino.utils.ArchiveExtractor;
 import cc.arduino.utils.MultiStepProgress;
+import org.apache.commons.io.FilenameUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import processing.app.BaseNoGui;
@@ -70,7 +71,8 @@ public class LibraryInstaller {
     // Step 1: Download index
     File outputFile = BaseNoGui.librariesIndexer.getIndexFile();
     // Create temp files
-    File libraryIndexTemp = File.createTempFile(new URL(Constants.LIBRARY_INDEX_URL).getPath(), ".tmp");
+    String signatureFileName = FilenameUtils.getName(new URL(Constants.LIBRARY_INDEX_URL).getPath());
+    File libraryIndexTemp = File.createTempFile(signatureFileName, ".tmp");
     final URL libraryURL = new URL(Constants.LIBRARY_INDEX_URL);
     final String statusText = tr("Downloading libraries index...");
     try {
diff --git a/arduino-core/src/cc/arduino/contributions/packages/ContributionInstaller.java b/arduino-core/src/cc/arduino/contributions/packages/ContributionInstaller.java
index e26bb6c20..a8bf08f09 100644
--- a/arduino-core/src/cc/arduino/contributions/packages/ContributionInstaller.java
+++ b/arduino-core/src/cc/arduino/contributions/packages/ContributionInstaller.java
@@ -41,6 +41,7 @@ import org.apache.commons.exec.CommandLine;
 import org.apache.commons.exec.DefaultExecutor;
 import org.apache.commons.exec.Executor;
 import org.apache.commons.exec.PumpStreamHandler;
+import org.apache.commons.io.FilenameUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import processing.app.BaseNoGui;
@@ -298,8 +299,8 @@ public class ContributionInstaller {
       try {
         // Extract the file name from the URL
         final URL packageIndexURL = new URL(packageIndexURLString);
-        String[] urlPathParts = packageIndexURL.getPath().split("/");
-        downloadedPackageIndexFilesAccumulator.add(BaseNoGui.indexer.getIndexFile(urlPathParts[urlPathParts.length - 1]).getName());
+        String indexFileName = FilenameUtils.getName(packageIndexURL.getPath());
+        downloadedPackageIndexFilesAccumulator.add(BaseNoGui.indexer.getIndexFile(indexFileName).getName());
 
         log.info("Start download and signature check of={}", packageIndexURLs);
         downloader.downloadIndexAndSignature(progress, packageIndexURL, progressListener, signatureVerifier);
diff --git a/build/windows/launcher/config.xml b/build/windows/launcher/config.xml
index 3d49f1890..1eb5a54ec 100644
--- a/build/windows/launcher/config.xml
+++ b/build/windows/launcher/config.xml
@@ -36,6 +36,7 @@
     <cp>%EXEDIR%/lib/commons-lang3-3.8.1.jar</cp>
     <cp>%EXEDIR%/lib/commons-logging-1.0.4.jar</cp>
     <cp>%EXEDIR%/lib/commons-net-3.3.jar</cp>
+    <cp>%EXEDIR%/lib/commons-io-2.6.jar</cp>
     <cp>%EXEDIR%/lib/jackson-annotations-2.9.5.jar</cp>
     <cp>%EXEDIR%/lib/jackson-core-2.9.5.jar</cp>
     <cp>%EXEDIR%/lib/jackson-databind-2.9.5.jar</cp>
diff --git a/build/windows/launcher/config_debug.xml b/build/windows/launcher/config_debug.xml
index 170ccc5f8..83d2d06f4 100644
--- a/build/windows/launcher/config_debug.xml
+++ b/build/windows/launcher/config_debug.xml
@@ -36,6 +36,7 @@
     <cp>%EXEDIR%/lib/commons-lang3-3.8.1.jar</cp>
     <cp>%EXEDIR%/lib/commons-logging-1.0.4.jar</cp>
     <cp>%EXEDIR%/lib/commons-net-3.3.jar</cp>
+    <cp>%EXEDIR%/lib/commons-io-2.6.jar</cp>
     <cp>%EXEDIR%/lib/jackson-annotations-2.9.5.jar</cp>
     <cp>%EXEDIR%/lib/jackson-core-2.9.5.jar</cp>
     <cp>%EXEDIR%/lib/jackson-databind-2.9.5.jar</cp>