How to switch between databases at runtime?

Hi,
I have 10 databases. I want to change the active database in "Image Target Behaviour" at runtime. How can I do that?

 

delete current data, init next data
code from here https://developer.vuforia.com/forum/faq/unity-load-dataset-setup-trackables-runtime

Code (CSharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. using Vuforia;
6. using System.Collections.Generic;
7.  
8.  
9. public class DynamicDataSetLoader : MonoBehaviour
10. {
11.     // specify these in Unity Inspector
12.     public GameObject augmentationObject = null;  // you can use teapot or other object
13.     public string dataSetName = "";  //  Assets/StreamingAssets/QCAR/DataSetName
14.  
15.     // Use this for initialization
16.     void Start()
17.     {
18.         // Vuforia 5.0 to 6.1
19.         VuforiaBehaviour vb = GameObject.FindObjectOfType<VuforiaBehaviour>();
20.         vb.RegisterVuforiaStartedCallback(LoadDataSet);
21.  
22.         // Vuforia 6.2+
23.         VuforiaARController.Instance.RegisterVuforiaStartedCallback(LoadDataSet);
24.     }
25.        
26.     void LoadDataSet()
27.     {
28.  
29.         ObjectTracker objectTracker = TrackerManager.Instance.GetTracker<ObjectTracker>();
30.        
31.         DataSet dataSet = objectTracker.CreateDataSet();
32.        
33.         if (dataSet.Load(dataSetName)) {
34.            
35.             objectTracker.Stop();  // stop tracker so that we can add new dataset
36.  
37.             if (!objectTracker.ActivateDataSet(dataSet)) {
38.                 // Note: ImageTracker cannot have more than 100 total targets activated
39.                 Debug.Log("<color=yellow>Failed to Activate DataSet: " + dataSetName + "</color>");
40.             }
41.  
42.             if (!objectTracker.Start()) {
43.                 Debug.Log("<color=yellow>Tracker Failed to Start.</color>");
44.             }
45.  
46.             int counter = 0;
47.  
48.             IEnumerable<TrackableBehaviour> tbs = TrackerManager.Instance.GetStateManager().GetTrackableBehaviours();
49.             foreach (TrackableBehaviour tb in tbs) {
50.                 if (tb.name == "New Game Object") {
51.  
52.                     // change generic name to include trackable name
53.                     tb.gameObject.name = ++counter + ":DynamicImageTarget-" + tb.TrackableName;
54.  
55.                     // add additional script components for trackable
56.                     tb.gameObject.AddComponent<DefaultTrackableEventHandler>();
57.                     tb.gameObject.AddComponent<TurnOffBehaviour>();
58.  
59.                     if (augmentationObject != null) {
60.                         // instantiate augmentation object and parent to trackable
61.                         GameObject augmentation = (GameObject)GameObject.Instantiate(augmentationObject);
62.                         augmentation.transform.parent = tb.gameObject.transform;
63.                         augmentation.transform.localPosition = new Vector3(0f, 0f, 0f);
64.                         augmentation.transform.localRotation = Quaternion.identity;
65.                         augmentation.transform.localScale = new Vector3(0.005f, 0.005f, 0.005f);
66.                         augmentation.gameObject.SetActive(true);
67.                     } else {
68.                         Debug.Log("<color=yellow>Warning: No augmentation object specified for: " + tb.TrackableName + "</color>");
69.                     }
70.                 }
71.             }
72.         } else {
73.             Debug.LogError("<color=yellow>Failed to load dataset: '" + dataSetName + "'</color>");
74.         }
75.     }
76. }

 

This code is really confusing and doesn't help.
It doesn't explain what each line does. Because of that I cannot apply this to my use case.