MDK-ARM version 5.43 installation: problem with folder name expansion

During installation of MDK-ARM v5.43 (dated Aug 1, 2025), when unpacking files the following is shown in command window:
I: Extracting files to %LOCALAPPDATA%\Arm\Packs
However, %LOCALAPPDATA% is not being expanded correctly. In my case it shoud be replaced by: C:\Users\dougr\AppData\Local\Arm\Packs.
Instead, the pack is expanded in the same folder as the installation executable (MDK543.exe).
How to fix this?  seems to me as a problem in the installer during the unpacking process.
thanks
Douglas Renaux