Activate your licence – does not work

Pinpoint Booking System

PROBLEM IS: When i follow Step 3, there is no activation field, instead it says:
“Activate the plugin and add-ons to check and receive automatic updates. Activation is not required to use the items.”

Initially i installed the free version and want to upgrade now on the pro version..

Activate your licence
To activate your licence follow the steps:
Step 1 – Sign into your WordPress admin.
Step 2 – Go to Pinpoint Booking System -> Settings page.
Step 3 – Select Licences submenu.
Step 4 – Enter the licence key and the email you used on our shop. Only this combination will work. You cannot use another email.
Step 5 – Click Activate to activate the plugin/add-on.

PROBLEM IS: When i follow Step 3, there is no activation field, instead it says:
“Activate the plugin and add-ons to check and receive automatic updates. Activation is not required to use the items.”

Initially i installed the free version and want to upgrade now on the pro version..

What should i do?

Thanks
Markus