The official Celtx website no longer hosts legacy installers. They only offer the new subscription service. Downloading from random “freeware” sites risks malware. Below are trusted sources.
| Problem | Solution | | :--- | :--- | | | Run in Windows XP SP3 compatibility mode. | | Blank white screen on launch | Disable hardware acceleration: Edit → Preferences → Display → Uncheck “Use OpenGL.” | | Script text is invisible/flickering | Change theme to Classic: View → Theme → Classic. | | Cannot save project | Run Celtx as admin and save to a non-system folder (not Desktop/Program Files). | | Storyboard images won’t import | Install older QuickTime 7 (legacy codec). | | PDF export is garbled | Use “Print to PDF” (Microsoft Print to PDF) instead of Celtx’s native export. | Celtx 2.9.1 Older Versions for Windows