Done With Musescore

I was working on a score. I was probably eight hours in. I was up till 3 am this morning working on the damn thing. It's a Christmas piece. I SAVED MY WORK BEFORE I WENT TO BED. There was no "asterisk" beside the file name. The file name could also be found in the Musescore 3 folder. This afternoon, I made a few changes that I didn't like, realizing I had made a mistake. I closed Musescore to resume later. I chose to "discard" changes. Now the file has VANISHED ENTIRELY. This is also the SECOND time this has happened to me. I'm so f-ing pissed off right now, and it's right before a Christmas performance. Hours and hours and hours gone down the toilet. On top of that, another score was flushed down the toilet last month. I am officially done with this piece of garbage program. Yep, I get that it is free, and I'm free to leave. GOT IT. I won't let the door hit me in the ass, don't you worry, friends. But if anyone out there takes their work and their time seriously, especially during this inflation, and you're a working professional and this is what you do for a living, DON'T USE THIS PROGRAM. This is not a program for professionals. Tata