So the 64-bit client is well and good, but the launcher is still 32-bit. This means it will not run on the next version of macOS. No good having a working client that you can't launch.
Ha! I haven't upgraded my Mac OS since 10.9.5
Mostly for app compatibility issues for some of the old video editing programs I use. Also, less chance of slowing down your computer.
I have the Catalina Public Beta installed on my MacBook Air and I can confirm that the launcher does not function and that you can't even install a new version with the current download launcher if you uninstall your current version.
I'm still playing on my iMac which is on Mojave so I figured I'd test Catalina out but I would hope there is a plan to address this.