NEW (default): due to incompatibilities with Windows 11 and/or antimalware software under Windows, Curl is no longer the default downloader; the default downloader is now the “Internal” one; you can still choose to use Curl if you wish (see Edit → Options), you'll find two options under Windows, CURL_
OS (the version of Curl shipped with Windows 10 and 11) and CURL_EXT (the version of Curl shipped with BootCaT);
NB: you need to use Curl if you want to use a proxy;