When I try to install the update I get this response.
An error occurred while installing the update. Please try again later.
If you are referring to the Mac application, please un-install this version, and download the latest version from http://www.todoist.com/mac.
All further updates will work.
Please dont laugh .. to hard. But I can't figure out how to uninstall it. It is not showing up in my applications folder.
You should be able to install this over the previous version as well.