I am getting the same message on Catalina on a Macbook Pro 2017. However, the application version on the drive is 18.104.22.168. If I try to run the file from the drive I get the grey Software installation window. If I choose yes to install it and then click continue, continue, install, and then Continue Installation, I get the error this package is incompatible with this version of MacOS (installation shows 1.6.0). I then click the Quit button and the login window appears and I can unlock the drive. I have noticed that sometimes it doesn't work on the first attempt and I have to attempt it the second time and it will work. Once the drive is unlocked it performs fine. I copied the application over to my desktop and it will also work but usually after the second attempt. I have tried installing 1.6.5 but it fails every time with no success. Just thought I would share this as I discovered it last week after upgrading to Catalina and trying to unlock two T5 SSDs I own. I just installed the 10.15 patch and it still works. It's still aggrevating but at least I can get to my files until Samsung issues a new version that works with Catalina.
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