KalkanHTTP, HTTPS and SOCKS5 proxies are supported (host:port:user:pass or socks5://user:pass@host:port). Paste a list into Proxies → Import; Kalkan checks each one, finds its country and stores the passwords in Windows Credential Manager.
The kill-switch blocks traffic if the proxy drops, and WebRTC / UDP never reveal your real IP.
Profiles → select profiles → Check proxies: the proxies are checked in parallel, with a measured latency. If a profile's proxy does not work, the launch stops before the browser opens and Kalkan tells you why.