renewal theme

Hello dear ones, I have made a website with catchbase pro. but this needs really update/upgrade. But does that really means in your system, that I have to buy this theme every year new, just to get the updates, so I can upgrade for the newest wordpress too? By enfold you buy the theme ones and you get the updates for free... I don´t need your support, just upgrade and updates. this is the site I´m talking about https://praxis-petra-weber.de/ I´m happy for any answer thank you and greetings Marga