Scripts not Updating

Hi guys!
Thanks in advance for your help!! I'm fairly new to unity so appreciate your patience.

I have created a game for IOS which I am able to load to my iPhone successful and it works perfectly other than one really specific issue. When I reinstall the app on my phone, most of the app updates apart from one script that appears to be running an un-updated version.

The script has an array of routes through the map and even though I have changed the routes in the CS file, which updates the game when I build within Unity, when I run it on the iPhone it is returning old routes that are no longer in the script?

Do I have to reimport the scripts before building or something?

Here is how I declare the array.

Code (CSharp):

1. int[][] routes =
2.     new int [][]{
3.         new int[] { 2, 12 }, //0
4.         new int[] { 2 },
5.         new int[] { 0},
6.         new int[] { 2, 13},
7.         new int[] { 13, 5},
8.         new int[] { 16, 17 },//5
9.         new int[] { 17, 19, 9},
10.         new int[] { 14, 16 },
11.         new int[] { 14, 16, 9},
12.         new int[] { 10, 8, 6 },
13.         new int[] { 11, 14, 9 },//10
14.         new int[] { 12, 10 },
15.         new int[] { 11},
16.         new int[] { 4, 3 },
17.         new int[] { 7, 8, 10 },
18.         new int[] { 16, 5 },//15
19.         new int[] { 7, 5, 8 },
20.         new int[] { 5, 6, 18 },
21.         new int[] { 19, 17},
22.         new int[] { 18, 6 },
23.         new int[] { 21, 18 },//20
24.         new int[] { 20, 19 },
25.         new int[] { 12, 23 },
26.         new int[] { 22, 11 }
27.  
28.     };

Thanks again,
Ben!