(Note to all reading this: Please do not add your question to an existing thread! Create a new one, even if your question is related to the question in this or some other thread).
Yes, you always need a password to open an encrypted file, however AxCrypt does remember the password while you’re still signed in.
In order to share encrypted documents with others, you need the Premium subscription. But any files encrypted with Premium can be opened with AxCrypt Free (if you know the password).