Version 4.00 doesn't really mark any significant changes but the previous version which was 3.99 could only be logically followed by incrementing the major number.
Version 4.40 brought in the first native 64 bit release which improved the performance of loading large images (more than 25 megapixels).
Works everything I have tested with the proccess described in extra comments.
What does not
Didnt found any problem
What was not tested
I had to install it in a Windows computer, copy/paste the IrfanView folder to .wine Program's one. You must have MFC42.DLL library.
|Operating system||Test date||Wine version||Installs?||Runs?||Used|
|Show||Fedora 33 x86_64||Nov 29 2020||5.22||Yes||Yes||No||Platinum||Artem S. Tashkinov|
|Show||openSUSE Leap 42.2 x86_64||Mar 27 2018||3.4||Yes||Yes||Yes||Silver||Rosanne|
|Show||Manjaro Linux||Sep 06 2016||1.9.17||Yes||Yes||Silver||Muttley|
|Show||Fedora 23 x86_64||Jul 14 2016||1.9.12||Yes||Yes||Silver||Richard Hollins|
|Show||Ubuntu 16.04 "Xenial" amd64 (+ variants like Kubuntu)||May 12 2016||1.9.9||Yes||Yes||Platinum||GP|
|Bug #||Description||Status||Resolution||Other apps affected|
|657||Many games and applications need 'mfc42.dll' ('winetricks -q mfc42' is a workaround)||NEW||View|
|4123||Picasa: "Open with..." menu item grayed out.||NEW||View|
|6682||IrfanView's 4.44 Help -> About window is missing a picture on the left||REOPENED||View|
|9404||cannot select TWAIN source in irfanview||NEW||View|
|9408||Irfanview cannot scan images||ASSIGNED||View|
|19496||Irfanview reports "Invalid MCI Device ID"||NEW||View|
|23898||Adobe Photoshop CS5 tool windows stay visible after switching to another program||NEW||View|
|25166||Multiple mime type handling registered for different file extensions||NEW||View|
|33978||Bug in converting/rendering Windows Metafile (SetWinMetaFileBits etc.)||UNCONFIRMED||View|
|40119||Irfanview 4.x: selection cursor is not correctly aligned||UNCONFIRMED||View|
|42171||IrfanView's 4.44 Help -> About window has wrong placement for textboxes||NEW||View|