Hi Steven! Our team has changed how we are doing the trial and we are rebuilding it for a new model in the future. We used to offer two trial flavours: .NET and JSS. We've taken the .NET one down to rebuild it and are only offering the JSS Trial right now.
We are also shifting away from providing licenses for the time being and moving towards a sandbox approach instead. This will make learning Sitecore easier since you won't have to install anything.
If you do have any questions about the Developer Trial, you can always reach out to email@example.com, which is also the address which will contact you with information about your trial.
If there is a reason you specifically need a license file, please let us know in that inbox so we can direct you to the appropriate people who can help you.