So you enter your credentials on the Login dialog, including the password. Then you click on Save and yet the "Save password" option on the Save dialog is disabled, right?

Then your system administrator probably disabled password storing on your machine:
https://winscp.net/eng/docs/administration#configuring

I am using WinSCP 5.19.6 under Windows 11 and it is working great. The issue is that I have to re-enter passwords for the websites I manage every time I start a new session of WinSCP. If I try to "Save Session as Site Dialog," the "Save password" checkbox is grayed out and unavailable. How do I save passwords for my various FTP accounts? Thanks.