I tried to do your last upgrade, but every time I get this error.
could you help me
where I can insert the print screen error?
You can your screenshot to [firstname.lastname@example.org].
Which app are you referring too? If you are talking about our Mac app please uninstall your current version and install the latest from http://www.todoist.com/mac.
We had some issues with the update system, it will be fine on the next update.