Uninstall Magics and bundled Materialise software (e.g. MatConvert) via Control Panel on your computer: Control Panel -> Programs and Features -> Search: Materialise
After Magics and bundled Materialise software have been uninstalled, make sure the installation folders are no longer remaining. If still existing, delete the following folders (example for Magics 28.0): C:\Program Files\Materialise\Magics 28.0 C:\Program Files\Materialise\MatConvert 10.9
Then remove the Magics application settings by deleting these folders (example for magics 28.0): %APPDATA%\Materialise\Magics\GuiProfiles\28.0.0.679 %APPDATA%\Materialise\Magics\matconvert_parameters %APPDATA%\Materialise\Magics\Preferences\28.0.0.679 %PROGRAMDATA%\Materialise\Magics\CustomPreferences\28.0.0.679 %PROGRAMDATA%\Materialise\Magics\Templates\Materialise Magics 28.0
Reboot your computer
Reinstall Magics with Administrator rights Execute the installer with "Run as Administrator", or run the installer when logged in with an administrative account (= user from local Administrators group)
During first run of Magics, do not import settings from previous Magics version