Don't throw if can't overwrite (Windows only).

modules/wrapper/src/main/java/com/beust/kobalt/wrapper/Main.java

@@ -239,7 +239,6 @@ public class Main {
                         Files.copy(zipFile.getInputStream(entry), entryPath, StandardCopyOption.REPLACE_EXISTING);
                     } catch (FileSystemException ex) {
                         log(2, "Couldn't copy to " + entryPath);
-                        throw new IOException(ex);
                     }
                 }
             }