Exporting a database: "Choose a data source." What???

I'm trying to export a SQL Server database, and things aren't going well. I hope someone can help.

First, the problem I've solved. I mention it because it may be a clue to what went wrong next.

I started SSMS (version 21.5.14+6.36429.23, if that matters), right clicked the database I want to export, and selected Tasks > Export Data. Whoops... Export Data was disabled. I researched this and learned that I must need to install the Import/Export Wizard. Which made no sense, because Import was enabled, and I have imported a database before. (If I hadn't, I'd have none to export!)

I tried to (re)install the Wizard, and that fixed the problem, although I still don't understand how it could have.

So, I clicked Export Data and got a Welcome screen. I clicked Next and got a screen titled Choose a Data Source. This is incomprehensible to me. I'm running the SQL Server Import/Export Wizard. I got there by right-clicking a particular database in a particular server. The only possible data source is that database. But the Wizard wasn't happy with that, and offered me a dropdown list of 13 options that meant nothing to me.

I figured I couldn't go wrong with the default, but I did. The default was "Net Framework Data Provider for Odbc." When I clicked Next, I got an error box that said, "The operation could not be completed. / The ConnectionString property has not been initialized. (System.Data)"

I could look up the meaning of the message, but I'm not sure that's what I want to know. Or I could look up the meanings of all 13 options in the dropdown and try to figure out which one to use to export a database, but I've got other things I need to do today. I came here.