Hi, I would like to distribute a trial version which would not require users to enter any registration key to open. Is this possible? Subsequently, can a user continue to use the same copy as registered after obtaining a key without downloading another version.
It’s not possible currently. You have to generate a trial key for your customer.
And yes, it is possible to use the same copy: just provide your customer with a registered key, i.e. a key that doesn’t expire for instance.