Changed the name. Small logic change. Changed from split join to regex replace.

test/tests/operations/MS.js

@@ -0,0 +1,22 @@
+/**
+ * CharEnc tests.
+ *
+ * @author tlwr [toby@toby.codes]
+ * @copyright Crown Copyright 2017
+ * @license Apache-2.0
+ */
+import TestRegister from "../../TestRegister.js";
+
+TestRegister.addTests([
+    {
+        name: "Micrsoft Script Decoder",
+        input: "##@~^DgAAAA==\\ko$K6,JCV^GJqAQAAA==^#~@",
+        expectedOutput: "MsgBox \"Hello\"",
+        recipeConfig: [
+            {
+                "op": "Micrsoft Script Decoder",
+                "args": []
+            },
+        ],
+    },
+]);