I have been using Opus for some time now but just recently when I try and rename a file or folder I get an error message saying that the file or folder is in use. I am just clicking on the file/folder to rename it, sometimes I have opened the folder to check the contents and maybe opened an image with the viewer but I have always closed the folder afterwards. It is now also happening without opening the folder.
The other error comes when I try to move a file or folder. The error message says it is in use. I have been checking just to see if I have a program open in which I used the file/folder even though I know that there is nothing running in the background.