Can I restart an expired Pro trial?

No. BetterDisplay does not offer a way to restart an expired trial. Paddle manages trials, and its management interface does not let the developer reset or extend an individual trial.

The 14-day trial is intended for testing Pro features with your own setup. Once it expires, eligible non-business users can continue using free features. A new feature to evaluate or a workaround discovered later does not start another trial.

If the app unexpectedly reports an expired trial when you believe the Mac has never used one, contact support through betterdisplay.pro. That is a licensing-status question to investigate, not a promise of a replacement trial. See Getting a Pro license for the trial and activation workflow.