After you have purchased your KWizCom add-on, you can activate your installed evaluation version.
Activating an installed evaluation version is done according to the following steps:

1. Open SharePoint Central Admin. On the main “Central Administration” page, you will see the “KWizCom Features Administration” icon:
   
   
2. Click the KWizCom Features Administration icon. You will be redirected to a page that allows you to manage all your installed KWizCom products’ licenses:
   
   
3. Click the “Manage License” link next to the product that you wish to activate. You will be redirected to that product’s license management page:
   
   
4. Click on the “Request product code and start your evaluation now” link, under the Farm license type
   A product code will be generated and displayed as in the following screenshot:
   
   
5. Copy and save the product code in a text editor to use later.
6. Browse to the Product Activation Request page on KWizCom’s web site:
   http://www1.kwizcom.com/Pages/activate%20Product.aspx
7. Copy your Account ID/Invoice Number into the "Account ID/Invoice Number" field, select the license type and click the “Load product details" button.
   For more detail how to find your "Account ID/Invoice Number", please read this KB article: http://support.kwizcom.com/KnowledgebaseArticle50203.aspx
   
8. Enter your product codes into the "product codes" field and click the "Update product details by product code" button.
9. The “Requested Products” field will now display all your products and available licenses for them.  You can select the number of front-end-servers (WFEs) to apply your available licenses to.  
   Ex: If you’re SharePoint Farm have 2 WFEs and 1 application server, you would select 2.
   
10. Copy the activation code into the “Activation Code” field into the product’s license management page and click “Activate now!” link.
    
    
11. If you have any questions, please contact us at activation@kwizcom.com or support@kwizcom.com 

That’s it! Your product is now fully activated

Watch the following video for a step-by-step activation guide of KWizCom add-ons on SharePoint: KWizCom add-on activation in SharePoint