I don't know which database I have

We can recognize many database files and pre-fill connection properties for you. This functionality is currently available only in Full Convert.

On the screen for source database connection, before you select type of your database, we offer you to open a file (or drag & drop it into the application). As soon as you do, we will tell you if we recognized what is it and even open a correct screen with everything set up to connect to your database.

Just click Next to continue with target database selection at that point.