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 Are there 32-bit and 64-bit installers for Gaaiho Reader? How to uninstall Gaaiho PDF Suite/Converter? Error (1609) while applying security settings - Users is not valid group? Comments 0 comments Please sign in to leave a comment.