First, creating a file and putting a single line in it shouldn’t be a big deal. We can provide assistance with that if you need it.
That being said, I can’t recommend running this application. It isn’t using a slightly out-of-date version of Electron. It is using an absolutely ancient version. Nothing should be using Electron 13 at this point. Especially something where security is important like an email program.
If that wasn’t concern enough it is also comes with a giant EULA from amazon and is a snap that is being unpacked and installed.