Trump administration re-categorized common small arms (non-automatic, under 50 cal) to no longer fall under ITAR, but instead be regulated by standard Dept. of Commerce international trade regulations. Since ITAR no longer applies and this case was brought based on ITAR rules, the case is over and settled based on the policy change. That was the intent of Trump making the policy change. But it's not a permanent situation. The "non-military" wording isn't a law change, just a presidential policy change.
It's just an administrative policy change. The next administration could swap it back at any time. It needs Congress to pass a law protecting blueprints and plans, or for the Supreme Court to decide a case in favor of the First Amendment. This case would have actually been better off making it to the Supreme Court, such that it sets a real legal precedent rather than just a political policy change.
If Trump loses the next election, this will likely get reverted back to being under ITAR.