there are three lessons here:
1. internet search has been made nearly completely useless by SEO spam and autogenerated websites.
2. never trust proprietary software. use open source software or software that generates human readable files.
3. maybe print out your important documents

@tubetime I found this dude that has a copy and was willing to translate files you e-mail him, lol. https://www.worldcadaccess.com/blog/2015/11/got-axd-files-we-got-actrix-2000-for-translation.html

@tubetime If you don’t mind e-mailing your AXD files to someone named Ralph Grabowski, they’ll get converted to DWGs and sent back to you: https://www.worldcadaccess.com/blog/2015/11/got-axd-files-we-got-actrix-2000-for-translation.html

@tubetime That's probably the best thing to do.
What I have learned from my old files: Don't try to store in other formats. You may lose data of that proprietary software, like vector graphics convert to a jpg. But keep the software you used. If you need it later, you can always run that old software in a VM and edit or export what you need.