Talk to a human.
One developer, one inbox. Write any time — every message is read by the person who actually builds the editor.
Support & questions
Something broken? Confused by a feature? Write to help@libertypdf.com — if you can, attach the file (or a screenshot) and mention your browser.
Security issues
Found a vulnerability? Report it to help@libertypdf.com and give us a reasonable chance to fix it before disclosing it publicly.
No phone lines, no ticket queues, no chatbots — email reaches the developer directly.