I'm working on nop 4.5. I have 2 databases (both in ms SQL server management studio). I want to change the database from db1 to db2. Both are DBs compatible with Nop as I was working on 2 similar projects.
In v4.5 the Connection string is in appsettings.json
1. Can you check on file explorer level ?
2. Make sure your open correct project ? looks like you didn't run this project before? run it and see which screen you are seeing in browser? share screenshot here.