If you have purchased a license for one company and now want to use the program for other companies then you must upgrade the license:
1. Click in the program on "Register now".
(https://www.itman-nv.com/forum/images/upgrade-en-01.png)
2. Click on "Next".
(https://www.itman-nv.com/forum/images/upgrade-en-02.png)
3. Select the option "Buy license" and click on "Next".
(https://www.itman-nv.com/forum/images/upgrade-en-03.png)
4. Select the option "Upgrade for unlimited companies" and click "Next".
(https://www.itman-nv.com/forum/images/upgrade-en-04.png)
5. Select the option "I must first register this Serial Number" and click "Next".
(https://www.itman-nv.com/forum/images/upgrade-en-05.png)
6. Fill in your details and click "Next".
(https://www.itman-nv.com/forum/images/upgrade-en-06.png)
7. Click on "Click here to register via our website".
(https://www.itman-nv.com/forum/images/upgrade-en-web.png)
8. Check your details, select a payment method and click on "Next".
(https://www.itman-nv.com/forum/images/upgrade-en-web2.png)
9. Check your email now for a confirmation with proforma invoice and payment information.