Version 1.0.6 of Go64 is now available, bringing intelligent updating that refreshes the data in Go64’s list of applications when you update an app on your Mac. This version also now runs on versions of macOS all the way back to Yosemite (10.10), so even if you’re updating to Catalina from a really old version of the system, you can still prepare with Go64.
If you’ve already got Go64, just choose “Check for Updates…” from its menu to get the new version. If you still haven’t downloaded it, you can get it from the Go64 page – it’s completely free (though donations are still appreciated).
Oh, and about that update-checking mechanism… I do know that the modal alerts that pop up in Go64 stall the installation of updates until you click “OK”. That’s also been fixed in version 1.0.6, so shouldn’t be a problem for updates after this one.
You can check here for a full version history for Go64.