Windows App Development: Server Launcher

I have an incomplete c# application that my previous developer failed to finish. It’s a server launcher application for game servers to allow players to join, it works by players downloading the application and then the applications scans the users pc for installed games, the games then show up in the launchers menu if that game is also listed in my web api and when a user clicks on the game it gives them an option to play the game which would in affect also join the linked game server. Their is support for vanilla games and modded versions of the same game, a modded version would show up as an option in a listed game and if the user clicks on the play button for the modded version then it will first check to see if any mods are installed and if not download the relevant mod resource pack using the web api, their will also be the option to revert back to vanilla since mods are generally installed in the same game directory as vanilla game. I have the c# visual studio project files