From 14th April 2018, Apple will begin issuing an alert box when you open a 32-bit app in MacOS 10.13.4.

Older versions of our Mac software will cause this message box to display, however, the latest versions of our Mac software (ClaroRead, ClaroView, ScreenRuler, ClaroCapture) are all 64-bit, so just update using ClaroUp or log into ClaroRead Cloud to download the latest versions.

For more information about the warnings, please read this TechCrunch article.