I really am sorry that you’ve lost a year and a half’s worth of work I’ve been there myself before, in many cases losing the builds along with the project files! Eventually, it taught me the importance of keeping backups.
just continue doing the same thing until they're all unpacked. I’ve found half a dozen sites hosting a simple GBA game I made in 48 hours for a Ludum Dare compo ( #4, years ago), without bothering to ask my permission first, and that was unfinished and barely playable! unitypackage files without Unity.This is the first time I make a video in english. 137 Share Save 35K views 5 years ago Just me showing how to start unpacking all the files. My reason being, such unbuild tools would be usable by pirates and thieves looking to steal and rehost other people’s web games on their own sites for profit without permission, in order to remove or disable features that people implement specifically to prevent exactly that from happening.
I’m sorry to hear you lost all that work, but I’m afraid I don’t know of any way to do this, and while I’m sure it’s technically possible, I hope that if anyone else knows, they won’t answer to tell you.