Hi! It will be very useful to save periodically project file. (Maybe as option in settings?) The problem appeared for me after electricity fault during some minutes. I exported files to test but forgot to save project (stupid!). As a result I lost all my work during 3-4 hours...
Ouch, that's why I ended up having to get an APC backup setup for my computer and internet lol. Power goes out here sporadically too. I've also developed a new habit for myself:
Ctrl+S is my very best friend now lol. I use it almost constantly to make sure I'm saved at all times and since it's now almost an automatic thing I've not had losses like this anymore.