diff --git a/src/main/java/com/dostalgia/UploadResource.java b/src/main/java/com/dostalgia/UploadResource.java
index 17a5f31..e498faf 100644
--- a/src/main/java/com/dostalgia/UploadResource.java
+++ b/src/main/java/com/dostalgia/UploadResource.java
@@ -113,7 +113,7 @@ public class UploadResource {
             game.setBundleFile(bundleFile);
             game.setPlatform(platform);
             // Store the selected executable and the full list for the UI picker
-            String relMain = extractDir.relativize(Path.of(mainExe)).toString().replace('\', '/');
+            String relMain = extractDir.relativize(Path.of(mainExe)).toString().replace('\\', '/');
             game.setExecutable(relMain);
             game.setExecutables(findAllExecutables(extractDir));
             if (setupExe != null) {
@@ -249,7 +249,7 @@ public class UploadResource {
             public FileVisitResult visitFile(Path f, BasicFileAttributes a) {
                 String name = f.getFileName().toString().toLowerCase();
                 if (name.endsWith(".exe") || name.endsWith(".com") || name.endsWith(".bat")) {
-                    result.add(dir.relativize(f).toString().replace('\', '/'));
+                    result.add(dir.relativize(f).toString().replace('\\', '/'));
                 }
                 return FileVisitResult.CONTINUE;
             }
@@ -428,7 +428,7 @@ public class UploadResource {
             var allDirs = new java.util.TreeSet<String>();
             try (var walk = Files.walk(extractDir)) {
                 walk.filter(Files::isRegularFile).forEach(f -> {
-                    String entryName = extractDir.relativize(f).toString().replace('\', '/');
+                    String entryName = extractDir.relativize(f).toString().replace('\\', '/');
                     int idx = entryName.lastIndexOf('/');
                     while (idx >= 0) {
                         allDirs.add(entryName.substring(0, idx + 1));
@@ -449,7 +449,7 @@ public class UploadResource {
                     .sorted()
                     .forEach(f -> {
                         try {
-                            String entryName = extractDir.relativize(f).toString().replace('\', '/');
+                            String entryName = extractDir.relativize(f).toString().replace('\\', '/');
                             zos.putNextEntry(new java.util.zip.ZipEntry(entryName));
                             Files.copy(f, zos);
                             zos.closeEntry();
@@ -471,7 +471,7 @@ public class UploadResource {
                     .sorted()
                     .forEach(f -> {
                         try {
-                            String entryName = extractDir.relativize(f).toString().replace('\', '/');
+                            String entryName = extractDir.relativize(f).toString().replace('\\', '/');
                             zos.putNextEntry(new java.util.zip.ZipEntry(entryName));
                             Files.copy(f, zos);
                             zos.closeEntry();
@@ -492,11 +492,11 @@ public class UploadResource {
 
     /**
      * Split a relative executable path into its directory and file parts.
-     * If relExe contains a '/' (or '\'), returns {dir, file}.
+     * If relExe contains a '/' (or '\\'), returns {dir, file}.
      * If relExe is just a filename, returns {null, relExe}.
      */
     private static String[] splitDirExe(String relExe) {
-        int idx = relExe.replace('\', '/').lastIndexOf('/');
+        int idx = relExe.replace('\\', '/').lastIndexOf('/');
         if (idx >= 0) {
             return new String[]{relExe.substring(0, idx), relExe.substring(idx + 1)};
         }