I’m using WinSSHTerm instead (it joins putty, pageant, file transfer and multiple configs together into a very nice ui, and its terminal works as expected). It is like an IDE of putty-related tools. Putty may be a default ssh window to the unix world, but it’s ui never felt good to me.

Some screenshots to get the idea of its ui: https://www.google.com/search?q=winsshterm&tbm=isch