If you have a corporate plan, your IT department might be able to download it using the corporate account, I think.
Or you might be able to download it using your account it you bought it or registered it using your account: https://helpx.adobe.com/au/download-install/kb/downloaded-older-app.html
Otherwise you could try contacting Adobe Support. The email address on the following page is recommended as it goes to a dedicated Robohelp team. You may need to provide proof of purchase, assuming they can help.
https://helpx.adobe.com/contact/enterprise-support.other.html#robohelp
