I've been having fun with these puzzles, but I don't appreciate being asked to download paid software from organizations I do not know or trust. Fortunately, this CTF can be easily completed with integrated browser features alone. Here, I'll document my step-by-step process - first in Firefox and then in Chrome.
First, start the instance and open the provided link.
Fill the form with whatever you please and submit it.
Bring up the developer tools by right-clicking anywhere and choosing "Inspect".