Realm-java: Encrypt an existing unencrypted DB

Good afternoon,

I am wondering whether is it possible to use Realm-Studio to encrypt an existing (unencrypted) database by supplying a key.
The unencrypted databases were created using realm-java.
I am looking at Realm Studio version 14.1.2, and I do not see any menu entries allowing the encryption and saving the updated DBs.

Is there another tool available that can be used to achieve this encryption?

Best regards,
Daniel