Hi,
As described in the first beta release, https://implodedsoftware.wordpress.com/2019/02/21/welcome-to-the-first-beta-version-of-helium-14/, you can use your Helium 13 license details when you work with this beta version.
ok , I didn´t read it (to the end), thanks
Mikael Stalvik
Read more about the release here:
https://implodedsoftware.wordpress.com/2019/03/02/helium-14-beta-2-now-available/