Recommended softwares
To upload files on your web servers, you can use a simple FTP client. I recommend WinSCP or CoreFTP.
If you are using FileZilla and you are experiencing problems (corrupted files, or your game can't start), try to re-upload everything with a different FTP client. A lot of my customers experienced troubles and corrupted files while using FileZilla.
When distributing your Launcher to your users, you also want to perform some setup tasks the very first time a player opens the Launcher. An installer software can help you on this. I recommend InnoSetup and NSIS.
To serve files you need to host them on a web service or you need to set up a web server. In the case you want to self-host your files on a web server, I usually recommend Apache or nginx.
If you want to install a local web server for testing purposes, preconfigured packages exist: check out WAMP or XAMPP.