Hello Nikola,

Beta testing is by invitation only.  There are a limited number of License Keys available, and due to demand not everyone is guaranteed a place on the beta testing program.

Please see this FAQ for further details:

https://helpcenter.websitex5.com/post/153330

The article also contains instructions on how to send a request to join the beta testing subscription list, if you have not already done so.

Many thanks!