If you install the Learning Edition, during the installation the installer will ask to create a new password for this database, if you don't remember, one option is to remove Blue Prism and Microsoft SQL Server 2017 LocalDB (this is only for the training, so don't worry, nothing else will be affected.) After that re-install and follow and the steps and write somewhere the password you set for the Admin user.
I hope this works for you.
This is the 2 app you need to remove.
------------------------------
Luis Lopez
Customer Support Engineer English and Spanish
Blue Prism Ltd
------------------------------