Leitostrap/Leitostrapper — reverse-engineered prompt

Build me a simple Roblox launcher called Leitostrapper, basically a lightweight Bloxstrap style app with an FFlags injector. I want a normal desktop window where I can install or launch Roblox, see basic status, and manage Fast Flag settings without editing files by hand.

Let users paste or edit flag names and values, save presets, enable or disable them, and apply them before Roblox starts. It should handle the config files safely, make backups, and show clear messages if something fails. Keep it simple and clean, with a settings page and a launch button, not a huge advanced tool.

If Roblox or the needed folders aren’t found, guide the user through fixing it. Please create the project from scratch with sensible defaults and write a short README that explains how to run it. Look up current Roblox and Bloxstrap related behavior online if needed.