In order to unarchive an item on the main screen of the app on iOS and iPadOS, please tap on the ‘Edit’ button in the top right corner of the app’s main screen (The one with ‘Accountit’ title), then select an item you would like to unarchive, tap on the ‘More’ button in the bottom right corner of the screen and select the ‘Unarchive’ option from the menu.
On macOS, please click on the ‘Checkmark’ icon in the toolbar next to the ‘Accountit’ title, then select an item you would like to unarchive, click on the ‘More’ button in the toolbar and select the ‘Unarchive’ option from the menu.