Hi,
I'm using KiTTY v0.63.1.4 on Windows 7 64bit and whenever I try to launch a second/subsequent session (using either the "duplicate" functionality or from the main window) the second/new instance crashes.
I didn't have this problem with the previous version. I actually confirmed that 0.63.1.3 is working correctly. I don't know if this is a portable apps problem or a base application problem.