This thread has information and a link that may help. I can't speak for its safety.
https://community.adobe.com/t5/robohelp/where-can-i-download-robohelp-9-from-the-website-i-have-my-s...
See this page for compatibility. I would not expect such an old version to work reliably with Windows 10. The last supported operating system was XP
https://helpx.adobe.com/robohelp/kb/robohelp-operating-system-microsoft-word.html
Any online output from that version is very unlikely to work in modern browsers.
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