You can discard checkout information.
1) Start up EDIUS, and open the checkout source project.
The checkout source project is displayed as [Check out] at [Status] in the [Start Project] dialog box.
The [Check Out Status] dialog box appears.
2) Click [Undo check out], and click [Yes].
The project file opens.
Open the checkout source project file, and click [Open as read-only] in the [Check Out Status] dialog box. Click [File] on the menu bar, and click [Field Editing] → [Undo check out] → [Yes].