Files can be optionally encrypted when storing them on SFTP server. 1653
Local UNC paths can be browsed. 133
Files can be copied to the clipboard. 316
Empty directories can be excluded from transfer and synchronization. 207
Files can be downloaded directly to an external drop location even without a loaded drag&drop shell extension.
It is always possible to use drag&drop to move remote files to external applications, while copy is always the default operation.
Improvements to directory synchronization:

    Synchronization runs on top of Synchronization checklist window for easier overview of the process.
    Showing overall synchronization progress on progress window and taskbar. 598
    File/directory rename can be resolved on Synchronization checklist window.
    Size of directories can be calculated on Synchronization checklist window.
    Synchronization summary is shown at the end of the operation. 1680
    Function “Keep remote directory up to date” can be started in a new window.
    During synchronization transfer speed limit is preserved across set of synchronized directories.
    Larger default size of Synchronization checklist window on larger screens.
    Not showing “Operation was successfully completed” when canceling Synchronization Checklist window opened from command-line.
    Not showing “Operation was successfully completed” message, after command-line synchronization operation, where there were no files to be synchronized.
    Once Finished option now applies to whole synchronization operation, not only to the current particular synchronization sub-operation.
    Preventing artifacts on Synchronization checklist window.
    Bug fix: When synchronization changes preview is turned off, and changes are found, but none of them match synchronization options, no feedback is provided.

Bookmark drop down menu. 1127
Added Generate button to SSH > Authentication page of Advanced Site Settings dialog, that starts PuTTYgen and detects a private key file generated by it. 386
Command to install public key in available both on main window and on Advanced Site Settings dialog. 386
Close button on session tab. 1393 Using it, a non-active session can be closed, as well as disconnected session without a need to reconnect it.
When a path entered in Open Directory dialog or Address toolbar cannot be opened, retry an entry to allow user to correct it. 1673
Public key can be displayed in Advanced Site Settings dialog.
Session tab can be renamed. 1183
Save as Preset command in transfer settings drop down menu. 892
Improved design of About window.
Build of .NET assembly that targets .NET Standard 2.0 is provided. 1640
.NET Assembly now targets .NET Framework 4.0.
Support for long local paths with FTP protocol. 1337
PowerShell script that runs WinSCP scripting commands can be generated on Generate Code dialog.
Transfer settings that do not have a dedicated scripting switch or a .NET TransferOptions property can be set using -rawtransfersettings switch or TransferOptions.AddRawSettings method.
Toolbar buttons can be hidden. 582
Found files can be edited from the Find dialog. 1634
Hidden files can be excluded from transfer/synchronization. 209
Session URL can contain any raw session settings using connection parameter. New custom command pattern !E can generate such URL for use in WinSCP extensions.
Session name specified by /sessionname command-line switch is preserved in workspace.
Time constraints can be set to a start of an interval.
today and yesterday time constraint aliases.
Configuration can be saved to read-only INI file by holding down Shift key while closing WinSCP or submitting Preferences dialog.
Change: Do not match URL after stripping protocol against stored site name in scripting/automation. 1647
Configurable keyboard shortcuts for extensions. 1613
When opening a session in PuTTY, exporting also cached host keys.
Low logging level. 1637
It’s possible to limit number of command line parameters used for open-ended switches like -rawconfig, -rawsettings and -rawtransfersettings using syntax -switch[count].
Optionally create background queue connection right after session starts (hidden settings). 1681
Natural order numerical sorting for directory tree. 1685
Distinguishing multiple sessions opened to the same site by current path. 1635
Change: Keyboard shortcut for Download command in Explorer interface changed to Ctrl+T (Ctrl+C previously).
Change: Keyboard shortcut for Open Terminal command changed to Shift+Ctrl+T (Ctrl+T previously).
Silently ignore errors writing a read-only INI file when automatically saving a workspace when exiting.
Do not show an error when remembered last used directories do not exist anymore. 1616
Not failing transfer if file selected for transfer, but excluded by file mask, is deleted during operation. 1677
Optimized loading time in scripting/.NET assembly mode. 1621
Use remembered private key passphrase in generated script/code. 1688
Generated code does not include fingerprints of TLS certificates signed by a trusted authority.
Preventing session tabs flicker with large number of sessions.
Moving session Color submenu to Session menu.
Not reloading site list when opening Login dialog/Site menu/etc where there is too many sites. 1658
Allow authentication with empty passwords in scripting. 1638
Preventing stall on startup when updating jumplist 1625 or resolving icons of common file types 1649 takes too long.
Ctrl+A is working in file/directory path selection boxes.
Parsing file modification time from display string if not provided explicitly in SFTP packet. 1665
Operation status is shown on task bar button and tray icon title also for command-line operations.
Not showing an estimated time left till the end of an operation for the first few seconds.
Hidden option to generate WebDAV URLs with http:// protocol prefix. 1668
Removed (non-working) panel loading animation.
Workaround for problems when uploading files from symlinked location (such as deduplicated drive). 1355
History of edit boxes can be deleted using Ctrl+Del keyboard shortcut. 1686
Bug fix: Hangs when clicking directory tree while inline editing file name. 1618
Bug fix: Failure when .NET assembly starts reading an XML log file in a short moment when it’s empty yet. 1619
Bug fix: Ad-hoc sessions opened with workspace duplicated into a new window had a wrong name.
Bug fix: When editing multiple files, opening ends on the first file that is already opened.
Bug fix: When minimizing command-line operation, task bar button was hidden.
Bug fix: Hint popup on too long transfer settings panel was truncated on separator (|) of exclude masks.
Bug fix: WinSCP instance without main window (opened from command-line) could incorrectly accept session opened from another instance.
Bug fix: Generated code included PortNumber property setter for all non-SSH protocols, even when the default port number of a respective protocol was used.
Bug fix: Prevent SCP server sending files that were not requested. 1675
Bug fix: Hang when doing an operation on FTP connection that disconnected on a background. 1679
Bug fix: Failure or delay when .NET assembly timeouts waiting for WinSCP process. 1683
Bug fix: When dropping files on another session tab, the target path was not set to the working directory of that session.
Bug fix: Orphaned hidden temporary folders were not being deleted.