A portable installation is only available for Windows. Download the correct portable package for your operating system from thereleases page. Extract the content from the archive to any place you want (e.g. USB thumb drive). Start the application by executing hakuneko.exe from the extracted folder.
It seems that there are many users who have difficulty uninstalling programs like hakuneko from their systems. Some experience issues during uninstallation, whereas other encounter problems after the program is removed.
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