When I open the Project Manager, the following message appears: "Project folder is not valid! The folder '...' of the project '...' cannot be found!"
If you don't need this project anymore, you can use the [Disconnect] button in the error message dialog box. If, however, you still need the project, you can first click [Skip] or [Skip All], if several directories are incorrect.
The projects in the Project Manager are defined by a specific path.
If the directory path is no longer valid, the project folder appears dimmed.
To delete the invalid project folder from the Project Manager, select the "Disconnect" option in the "Project" menu. The button is not called "Delete," because the folder represents merely a link to the Windows Explorer.
If you want to work with this folder again, you have to restore the corresponding path definition. To do this, select "Create Folder" in the "Project" menu to recreate the folder in the originally defined directory.
You can also disconnect the project, create a new project, and then assign it to the new path.