We are glad to announce the immediate availability of HelpNDoc 3.9.1 which fixes the problem some were experiencing when starting HelpNDoc, saying that a control had no parent window. We also took this opportunity to update the default CHM template to provide a way to customize the base color as it is already possible to do with the default HTML template. This minor update also fixes a rare problem with the HTML search engine which could do infinite loops and another issue where the ePub generator couldn’t correctly generate the eBook’s cover picture. Learn more in the detailed change log below and download your free version of HelpNDoc now.
Change log
Version 3.9.1.648 – Release date: May 21, 2013
- CHM generator's base color can be customized in the template properties
- An exception could be displayed when the application is launched indicating that a control had no parent window
- ePub generator didn't always correctly generate the cover picture
- HTML search engine did infinite loops after clicking on the result when it ended with a space character
See also...

Cross-Topic References, Customizable AI Assistance, and Authoring Performance Improvements in HelpNDoc 10.3
We are pleased to announce the release of HelpNDoc 10.3. This new version refines the authoring experience with a strong focus on structured cross-referencing, improved HTML customization, more …
Read More →
Active AI Agents, Non-Modal Multitasking, and Enhanced Navigation Tools in HelpNDoc 10.2
We are excited to announce the immediate availability of HelpNDoc 10.2, a release that fundamentally changes how technical writers interact with their authoring tools. The AI Assistant has graduated …
Read More →HelpNDoc 10.1 Introduces Incoming Link Tracking in the Topic Analyzer and New Bookmarks for Faster Navigation
We are pleased to announce the release of HelpNDoc 10.1, the latest update to our popular help authoring tool. This version introduces several key improvements designed to make content management, …
Read More →
Import Projects, Organize Topics Faster, Export AI-Friendly Markdown, Style Images with IDs & Classes, and more in HelpNDoc 10.0
We are thrilled to announce the release of HelpNDoc 10.0, a major milestone in the evolution of our help authoring tool. Packed with powerful new features, smarter workflows, and important fixes, this …
Read More →