If you are specifically seeing messages about Logger Pro not being 64 bit, that means you are running an older version of Logger Pro, and you should install the update, here:
https://www.vernier.com/support/updates/logger-pro/

The current version of Logger Pro, version 3.16, is 64 bit and is fully supported on macOS 10.15 Catalina.

See also:
Are your apps supported in macOS 10.15 Catalina?
macOS gives a message on launch of Logger Pro that "Logger Pro has not been optimized for your Mac"