IDM has an automatic update option, and IDM can check for the availability of a new version once per week. Once a new version becomes available, IDM will show a dialog that describes all new features and suggests updating your current version. You may also check for updates manually at any time using "Help→Check for updates..." IDM main menu item.
What's new in version 6.40 Build 2
(Released: Dec 09, 2021)
- Fixed several bugs in download engine
 - Fixed bugs with custom fonts.
 - Fixed a problem when using a large font on low screen resolution, IDM dialogs and fonts do not increase over screen size now.
 - Fixed problems with not fitting button names in IDM Options and in IDM Scheduler when fonts with wide metrics are used.
 - Fixed problems with cutting tabs on download progress dialog.
 - Fixed other minor bugs with custom fonts
 
What's new in version 6.40
(Released: Nov 29, 2021)
- Improved download engine. Increased download speed for several web sites
 - Fixed timeout problems and other errors when establishing connection with some web sites
 - Added support for "Make text bigger" feature in Windows 10/11 accessibility settings. IDM will change the font size now
 - Added the selection of font for IDM interface to "View→Fonts" menu item of main IDM window
 - Improved the processing of capturing downloads from the web sites that don't allow making second http request
 - Fixed others bugs
 
What's new in version 6.39 Build 8
(Released: Oct 29, 2021)
- Fixed "403 Forbidden" downloading problem for some web sites
 - Fixed bugs
 
What's new in version 6.39 Build 7
(Released: Oct 22, 2021)
- Fixed a bug when assembling several types of MKV videos
 - Fixed other minor bugs
 
What's new in version 6.39 Build 5
(Released: Oct 19, 2021)
- Fixed a bug with selected group downloads from the browser
 - Fixed problems with some types of large files
 
What's new in version 6.39 Build 3
(Released: Oct 15, 2021)
- Increased download speed for several web sites
 - Resolved problems with https downloading for some users
 - Improved video recognition for some web sites
 - Fixed problems with downloading for several types of video streams
 - Fixed bugs
 
What's new in version 6.39 Build 2
(Released: Jul 16, 2021)
- Added search in an old way in full IDM list (F3) when closing the SearchBar
 - Fixed a bug with adding downloads from the command line
 
What's new in version 6.39
(Released: Jul 14, 2021)
- Changed the search dialog (Ctrl-F) and added SearchBar
 - Fixed a problem with searching Unicode strings
 - Added the ability to show "Parent web page" column to the list of downloads of the main dialog
 - Fixed problems with downloading from several sites
 - Fixed bugs
 
What's new in version 6.38 Build 25
(Released: May 10, 2021)
- Improved download engine
 - Fixed bugs
 
What's new in version 6.38 Build 23
(Released: May 05, 2021)
- Resolved browser integration problems some versions of Windows 10
 - Added support for new types of video streams
 - Fixed bugs
 
What's new in version 6.38 Build 22
(Released: Apr 30, 2021)
- Fixed problems with downloading for several types of video streams
 - Fixed bugs
 
What's new in version 6.38 Build 21
(Released: Apr 17, 2021)
- Improved browsers integration
 - Fixed problems with downloading from several sites
 - Fixed IDMMsgHost.exe crashes
 - Fixed bugs
 
What's new in version 6.38 Build 18
(Released: Mar 03, 2021)
- Fixed problems with downloading for several types of video streams
 - Improved the interception of downloads
 - Fixed bugs
 
What's new in version 6.38 Build 17
(Released: Feb 12, 2021)
- Improved download engine
 - Fixed bugs
 
What's new in version 6.38 Build 16
(Released: Dec 25, 2020)
- Added support for new types of video streams
 - Fixed bugs
 
What's new in version 6.38 Build 15
(Released: Dec 10, 2020)
- Fixed a critical bug
 
What's new in version 6.38 Build 14
(Released: Nov 25, 2020)
- Fixed problems with downloading for several types of video streams
 - Fixed the problem with the pale drawing of the download panel in FireFox 83 on Windows 7
 
What's new in version 6.38 Build 12
(Released: Nov 17, 2020)
- Improved the interception of downloads on some sites
 - Improved downloading files intercepted from Chrome based browsers
 
What's new in version 6.38 Build 11
(Released: Nov 14, 2020)
- Improved download engine
 - Fixed handling of HTTP status "308 Permanent Redirect"
 - Fixed bugs