PicoTorrent is a minimal BitTorrent client. It is designed to be a very friendly BitTorrent application for Windows with high performance, low memory usage and a working user interface.
What it offers:
Powerful encryption with support for tunneling via I2P, SOCKS4, SOCKS5 and HTTP (S)
Works with IPv4 and IPv6
Multilingual user interface
Free, open code, with a wonderful community
PicoTorrent has been developed to be integrated directly into Windows APIs and will run seamlessly on all supported Windows platforms.
Setting up a proxy connection is easy. PicoTorrent supports I2P, SOCKS4, SOCKS5 and HTTP (S) proxy servers as well as strong encryption.
Try the app and read it change log of the new version
https://picotorrent.org/download