Do you have any backups? Do you have Time Machine enabled?
I know if doesn’t help much now, but to help deal with issues in the future (as you never know when something like this will happen, or your computer will die/be stolen) it is a good idea to have a solid backup strategy.
I’d recommend getting a couple of external hard drives, setting one up for time machine, one as a bootable backup (using SuperDuper or similar) and an offsite backup using a service like BackBlaze.
Good luck getting this sorted @mailmer, I appreciate how frustrating it can be when things go wrong.
Also… did you publish the project by any chance? If so, you may be able to recover your Hype document by following these steps.