MySpreadsheet automatically keeps the list of the last files opened in the application. The recent files list stores both local files and files opened from the cloud. The latter are marked with a cloud icon next to them.
To open a file from this list, click the
button. The main menu and the Recent files pane will open. In the Recent files pane, select the desired file. When working in macOS, you can also run the File > Recent files command from the command menu and select the desired file from the sub-menu that appears.

If the list of recent files has become irrelevant, clear it. To do this, click Clear in the Recent files pane header. When working in macOS, you can also run the File > Recent files > Clear command from the command menu.