I have a new phone. It appears tsheetsevolved.com is no longer synchronized with my microsoft authenticator app

I am trying to log in to tsheetsevolved.com. I received a code to enter into the authenticator app from tsheetsevolved, but I don't get a notification from the authenticator app to enter the code. I feel I need to rescan the barcode to synch the software with the authenticator app, but do not know how to get a new barcode.

Thank you for your help