Every time I make a change to a score and save it, Musescore creates a new file and renames the old file to .[score name].mscz,. Musescore will not open the renamed file and I get tired of always having to delete useless files.
Here's what it looks like.
This also happened in Musescore 2.2 sometimes but not always. I have the latest version of Musescore 3 (I updated today) and I'm running it on Windows 10.