2 ideas

Good software, but i can't drop files from ftp to my deskop but in other file it works.
And we can't navigate in the ftp when we do a transfert like in FileZilla.
And finally i filezilla i see files that i don't see with WinSCP, don't understand why.

Matthysse wrote:

Good software, but i can't drop files from ftp to my deskop but in other file it works.

What does it mean "in other file it works"?

And we can't navigate in the ftp when we do a transfert like in FileZilla.

You can start a transfer on background. Or move an existing foreground transfer to background.
https://winscp.net/eng/docs/transfer_queue

And finally i filezilla i see files that i don't see with WinSCP, don't understand why.

Please post verbose log files both from WinSCP and FileZilla.