Downloading update difficulties

I’m not sure if its only me, but I can’t download the latest Devonthink Pro. I still have 2.3.3. I have tried about 10 times, both through the update thingy in the app itself, and from the website.
Is this a general problem?

Declan

If the Sorter is running, Quit it. Make sure the currently installed DEVONthink app isn’t running, then Control-click on it and choose the option to move it to the Trash.

Go to the Download page and download the app for which you purchased registration. Install it in the Applications folder.

Launch the new version of your DEVONthink app, and allow it to run the Install Add-Ons procedure.

That did the trick. I’m still not sure why I was having the problem, but this method worked.
Thanks,

Declan