Can't save files in calc.

Just downloaded version 6.1.5.2 using windows 10 (x86). I am unable to save and calc or writer file. Error says “file not found”. I tried downloading version 6.1.4.2 and got the same result. Calc file was created using version 5. Suggestions?

(Revised) I am confused about your problem. In order to save a file in LibreOffice, you must have it open already. If the file is open, then obviously it has been found. This sounds more like an operating system (Windows) problem than an LO problem. There are several different ways to save files. Please tell us exactly what steps you take when you try to save a file??

Also, have you read the comments and answer to this problem