I am using 2014.5 on a PC with Windows 11.  Finale is installed on my C: drive, but I save all my work to my D: drive. I use finale for songwriting so my work tends to be iterative over time. 

I have had several instances now where Finale has lost my file. After having a file open for a few days and each time I work on it, I save my changes. Sometimes closing one file then opening another, everything is working as expected. Then out of the blue, I go to save the file and I get "Finale cannot find the file specified".  I open the directory and its not there. I have saved it there 20 x's by now. Or sometimes this happens when I open finale and try to find a file I worked on recently I get the same message.  Finale has created a backup folder on my D: drive I can find my latest version there, but I very troubled by why it would "Lose" the one in my working directory.  Any ideas?

Thanks, Frank.