SAFRAN supports “Undo” functionality - the possibility to return to state of the project as it was one or several steps back.
Undo operation is disabled by default - to enable it open Options dialog by selecting Options from main menu and select Environament (advanced options) tab.
To make Undo operation - select Undo from Edit sub-menu of main menu. In some cases you may need to update information in object browser after this operation.