How to upgrade Gaaiho Reader? Kolas Hemek November 26, 2013 09:14 No need. Gaaiho Reader has a update feature that regularly checks for the latest version. Related articles How to update Gaaiho PDF software to the latest version Why does error message "126" show during Gaaiho PDF Converter installation? Are there 32-bit and 64-bit installers for Gaaiho Reader? Failed to convert files, and a message says "Gaaiho/Zeon license service is not started"? How to uninstall Gaaiho PDF Suite/Converter? Comments 0 comments Please sign in to leave a comment.