This is the first release that brings together v5 and v6 releases. Now all releases are based off v6 source code, so the bugfixes and improvements will be applied to both versions.
Blokada 5 is renamed to Blokada Libre (available on blokada.org)
Blokada 6 (Cloud) is renamed to just Blokada (available on Google Play)
Changelog: https://go.blokada.org/changelog
More: https://community.blokada.org/