WinSCP 6.3.1

A complete list of files that are part of a background transfer can be shown. 1785
Stream interface in .NET assembly. 1738
With SFTP protocol files can be streamed to stdout and from stdin in scripting.
Support SHA-256 fingerprints of TLS/SSL certificates. 1842
Extension Synchronize with another remote server.
When connecting to new SSH host, its host key can be automatically accepted in scripting and .NET assembly.
Optional case-sensitive synchronization. 71
Enabled TLS 1.3 by default.
XML parser upgraded to Expat 2.2.10.
SSH core upgraded to PuTTY 0.74. It brings the following change:
Security fix: If an SSH server accepted an offer of a public key and then rejected the signature, WinSCP could access freed memory, if the key had come from an SSH agent. vuln-agent-keylist-used-after-free
Resume transfer when FTP data connection disconnects. 1878
Support for curve25519-sha256 KEX. 1865
Support for authentication using temporary credentials from AWS Security Token Service (STS). 1839
Support for SNI with FTP. 1895
Installer upgraded to Inno Setup 6.1.2.
Change: Installer needs Windows 7 SP1/2008 R2 SP1.
Alternative way to provide credentials in scripting/command-line without URL-encoding. 1821
Compatibility with WebDAV servers that incorrectly encode file URL. 1876
Optimizing S3 connection buffers for speed. 1732
Edited/opened files from a disconnected session can now be attached to new session even if its username was entered only during authentication instead of directly on the Login dialog. 1890
Returning to Login dialog, when ad-hoc connection fails. 1909
Local ports for active FTP mode can be limited. 958
Allow explicit navigation to a hidden local folder by enabling showing of hidden files and folder, if not enabled yet. 1905
Added full Go To submenu to context menu of panel path label
Automatically restore external editor defaults when changing editor command from Notepad to 3rd party editor. 1872
Suppress errors when opened/edited files are locked. 1832
Support clearing GID/UID flag on directories with new versions of GNU coreutils. 1850
Added /nointeractiveinput to usage screen.
List encrypt-then-MAC algorithms in /info listing. 1917
Not using a transfer via temporary file for files that would exceed system length limit with the temporary extension. 1922
Automatically closing timed out Session. 1923
Logging IANA encryption algorithm names. 1886
Displaying, what directory is being read at the end of login to a server, in a tooltip. 1916
Use dark window title for the main window in the dark mode on Windows 10 2004. 1920
Clarified that WinSCP may crash in the warning message when trying to load too big file into the internal editor. 1847
Do not prevent WinSCP from working when jump list cannot be updated. 1857
Allow forcing use of LIST command to retrieve file information in scripting for FTP servers that has broken support for MDTM/SIZE commands. 1921
Duplicate and Rename commands work even for disconnected sessions.
IPv6 literals with scope or literals that are already escaped in square brackets are formatted standardly in session URL (instead of URL-encoding them).
Allowed longer input on Edit file input box. 1911
Added help link to Add extension box and making the box wider.
GSSAPI key exchange authentication can be turned on. 1863
When trying to open an inaccessible local directory, display an error message, instead of silently doing nothing.
Cleanup application data dialog labels cache cleanup checkbox label updated to reflect previously updated functionality.
Disabling tips controls until some tips are actually available.
Optionally disable moving using drag&drop. 1884
Main window follows Login dialog to another monitor, when switched using keyboard shortcuts Shift+Win+Left/Right. 1907
When path to an existing local directory is specified on the Download options dialog without an operation mask, a noop operation mask is implied.
Workaround for wrong description of Num * keyboard shortcut in menus with German keyboard. 1889
Files with the same name except for a letter case are sorted deterministically. 1894
Not offering pasting from clipboard on the file panels if the clipboard contains multi-line text.
Extending transfer dialog drop down menu size to 16 entries.
Bug fix: Local file panel ignored changes in latter case of files and folders. 1885
Bug fix: Local custom commands that need session but no remote files were not disabled when session was not connected.
Bug fix: Correct letter case variant of remote directory in directory tree was not always selected. 1891
Bug fix: With no connected session, shared bookmarks modifications are not preserved.
Bug fix: Using list header color appropriate for the actual light/dark column background color (list headers are not dark, unless system wide app dark mode is enabled).
Bug fix: Session.ParseUrl cannot accept fingerprint parameter for sessions over TLS. 1925
Bug fix: Custom command patterns !S/!E do not include fingerprint of TLS certificate.
Bug fix: Cannot work with filenames ending with space with FTP protocol. 1900
Bug fix: Canceling remote path drop down did not reset it back to the current path.
Bug fix: Folders in a drive root showed incorrect type name sometimes.
Bug fix: Customizing custom commands from Synchronization checklist window was not working. 1908
Bug fix: Whole local drive could have been scanned when trying to browse to non-existing or hidden folders.
Bug fix: Timed out status bar note was not added to history popup box, while a session is disconnected.
Bug fix: Duplicate command in remote file context menu operated over selected files instead of the focused file.
Bug fix: *nix shell special characters were unintentionally escaped in PuTTY/SSH terminal command patterns. 1906

Translation updated: Farsi.
Support for PPK version 3 keys from PuTTY 0.75. 1986 ppk3
SSH private key tools (PuTTYgen and Pageant) upgraded to PuTTY 0.75. It brings the following changes:
Pageant now supports loading a key still encrypted, and decrypting it later by prompting for the passphrase on first use. pageant-deferred-decrypt
Upgraded default SSH key fingerprint format to OpenSSH-style SHA-256.ssh-fingerprint-formats
PuTTYgen now supports alternative provable-prime generation algorithm for RSA and DSA.
Replaces Windows Pageant’s IPC with named pipes. pageant-named-pipe
Bug fix: PuTTYgen mis-writes OpenSSH private key format for some Ed25519 keys. openssh-ed25519-corrupt-private-key
Bug fix: Moving a transfer to background just in between two individual file transfers cancels the transfer. 1983
Bug fix: Files saved in external editors are not uploaded in timezones behind UTC. 1985
Bug fix: Sort > By Type icon for was still incorrect