This feature is helpful if a server, that holds the sources of the project files, is down. The statuses of files and directories become irrelevant, and you are unable to work with the local copy of the project. To avoid such situation, you need to refresh the status of your source files.
When this command is applied, PyCharm Edu refreshes the status of each file, no matter whether the file has been changed from PyCharm Edu itself or using any other application.
The status of a file is refreshed only in accordance with the changes in your local workspace. Any changes on the server can be reflected only through synchronization.