When I launched RW today I got a notice about RW 6.2.4 and selected the option to Download and Install the update. I received the prompt to Install and Relaunch. RW closed down but did not start up. I could not start RW 6.2.4 from Finder either, the file size was 9.2Mb.
I used the Link in an email to download the entire application and that seems to work.