Sorry first I posted it wrong on another computer, so it replied to the whole digest..
Here is the message repeated in this thread and I wish I could just cancel the other one two seconds after I emailed it.
Specifically the most important file of all is the .ml file on the last computer where you had all the correct tasks, even if it is currently sychronized in the cloud. Many lose something because the cloud sync can be confusing how it has to work.
So back up that old .ml file from your old computer before you even open mlo again on that computer! Typically you basically need always keep offline backups of the Documents\MyLifeOrganized folder, everything in it where that .ml file should be if you didn't change the location.