Issue description
Whenever I try to open my mod file from 1.8.3 in the new 1.9.0 update, I end up getting this message saying that the directory space is not empty. So I went further into the McreatorWorkspace folder and into .mcreator and it ends up saying that the directory has an invalid path. Have I done something wrong in opening it? Is it a bug? Or is it that I'm missing something else?
Import the workspace in a new empty folder. MCreatorWorkspaces is not empty as it contains folder .mcreator in it.
The issue is that your folder Mr. Memington's PC contains letter ' which is not allowed in the path. My recommendation for your case would be to make a new folder on drive C: called workspaces and store workspaces in subfolders of this folder.