Backup Files

When you save a project, XFEM4U makes a backup copy of the previous version of the project (that is, the project file before the current save). This backup copy has the name "backup".xfem, where is a 3-digit number indicating how many times the file has been saved. The backup-ups are stored in the subfolder "XFEM4U_Backup". The number of backup files is 3.