Patch 1.05.1, which until now has been available only as beta, is now the latest official version of Darkest Hour.
Savegames and mods for 1.04 are NOT compatible with 1.05.1.
Savegames and mods for 1.05 are compatible with 1.05.1.
The complete changelog of patch 1.05 can be found here: https://forum.paradoxplaza.com/forum/index.php?threads/darkest-hour-dev-diary-34-patch-1-05.1058632/
For more details, please refer to the Paradox forum: https://forum.paradoxplaza.com/forum/index.php?forums/darkest-hour.554/
Patch 1.04 and previous patches are still available on the Beta tab.