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 How to uninstall Gaaiho PDF Suite/Converter? 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"? Comments 0 comments Please sign in to leave a comment.