Allow hex and decimal format for Windows Filetime format as those are the formats they are typically represented in

src/core/config/OperationConfig.js

@@ -2271,6 +2271,11 @@ const OperationConfig = {
                 name: "Output units",
                 type: "option",
                 value: DateTime.UNITS
+            },
+            {
+                name: "Input Format",
+                type: "option",
+                value: DateTime.FILETIME_FORMATS
             }
         ]
     },
@@ -2284,6 +2289,11 @@ const OperationConfig = {
                 name: "Input units",
                 type: "option",
                 value: DateTime.UNITS
+            },
+            {
+                name: "Output Format",
+                type: "option",
+                value: DateTime.FILETIME_FORMATS
             }
         ]
     },

src/core/operations/DateTime.js

@@ -90,7 +90,13 @@ const DateTime = {
      */
     runFromFiletimeToUnix: function(input, args) {
         let units = args[0];
-        input = new BigInteger(input).subtract(new BigInteger("116444736000000000"));
+        let format = args[1];
+        if (format === "Hex") {
+            input = new BigInteger(input, 16);
+        } else {
+            input = new BigInteger(input);
+        }
+        input = input.subtract(new BigInteger("116444736000000000"));
         if (units === "Seconds (s)"){
             input = input.divide(new BigInteger("10000000"));
         } else if (units === "Milliseconds (ms)") {
@@ -116,6 +122,7 @@ const DateTime = {
      */
     runToFiletimeFromUnix: function(input, args) {
         let units = args[0];
+        let format = args[1];
         input = new BigInteger(input);
         if (units === "Seconds (s)"){
             input = input.multiply(new BigInteger("10000000"));
@@ -128,10 +135,22 @@ const DateTime = {
         } else {
             throw "Unrecognised unit";
         }
-        return input.add(new BigInteger("116444736000000000")).toString();
+        input = input.add(new BigInteger("116444736000000000"));
+        if (format === "Hex"){
+            return input.toString(16);
+        } else {
+            return input.toString();
+        }
     },
 
 
+    /**
+     * @constant
+     * @default
+     */
+    FILETIME_FORMATS: ["Decimal", "Hex"],
+
+
     /**
      * @constant
      * @default