In this brand new Version you're not required to select a text file anymore, the app will create a new file if desired, also, the app will point you to the created file via a button called "Show in Folder" :)
Note: you need to have .NET6 Runtime to be able to use the app.
Perquisites:
Link to Download .NET6 Runtime
this update was in a hurry, So Source Code is not accurate, Don't Download it :)