winscp will not let me drag and drop files ONTO server

Problem is Windows7 because I am moving files onto many linux which previously worked

Do you know a windows7 solution

Are you connecting via FTP, or SFTP/FTPS?

ftp

Have you tried a different version of WinSCP? Either an older version, or the latest 5.6.4 RC ?
http://winscp.net/eng/index.php

I checked today; still latest version
Yes maybe an update may have not worked well with my computer

I prefer not to uninstall current version to install older version

If I get latest beta, will I have to uninstall current version (thus maybe losing my saved connections)

Download the "portable executables." They're zip files you can unzip and run it from anywhere; it won't replace the installed version.
http://winscp.net/eng/download.php 

If you're only using FTP, there's plenty of other free FTP programs. You can use the built-in Windows command-line FTP client to test:
http://www.computerhope.com/issues/ch001246.htm

Other free FTP clients for Windows include Cyberduck and Filezilla:
https://en.wikipedia.org/wiki/Comparison_of_FTP_client_software

Then I need to try another program and re-enter passwords; which I forget

Are you moving or drag/dropping?

Yes, this previously worked

Do you get an error? If so, post that (screen shot).

Just an 'x' with mouse hover

Do you have commander or explorer interface in WinSCP?

explorer

What are your settings under Preferences->Transfer->Drag&Drop and Background?

tried both
checked/unchecked
allow moving from remote directory to other applications

The troubleshooting on my windows7 allows program to work.
Thanks.