The list of changes can be found here.
Windows
LOOT requires a 64-bit version of Windows 10 (1809) or later and the MSVC 2019 x64 redistributable.
The .exe installer will automatically download and install the redistributable if you don't already have it installed.
7-Zip is required to extract the .7z archive on Windows 10.
Linux
LOOT requires a 64-bit version of Linux, and can be installed from Flathub.