I updated my Mac and now Manager won't open anymore. I need the information out of my invoices to bill clients with open invoices. Help please!

[ries]

Does this link help you?

'Manager.io' folder appearing in user 'Documents' folder on Mac

That’s correct. The old Change Folder button would be creating data file. New command doesn’t. So when you use the new Change Folder function to set your custom data folder, you can delete data file manually because new version won’t be creating it anymore.

Do you have a backup of your manager files?