Not able to attach WinSCP to Windws 7 tool bar

Unfortunately I'm not able to stick the portable app to Windows 7's tool bar. No problems with 5.1.x versions. I'm running Windows 7 ultimate 64bit version. Would be glad if you could investigate.

Works fine for me on the same system. Can you please provide more details? What are you doing (exact steps) and what happens? Recording a video or using Windows Step Recorder would help.
https://winscp.net/eng/docs/reporting#howto