I have used MN for many years and it works great! Recently, the MN3 in my Mac was upgraded to the latest version and I found that some of my documents are missing. Their icons are still there but they are not accessible anymore. There is no response when double clicking them. These files can still be found in my iCloud Drive and I have no problem to open them. They can also be accessed by MN3 installed in my iPad. Why? Anyone could help?