In EBPro, click on the File menu and select Preferences. On the Project tab, check the “Generate backup of project file before save” option. This will create a backup of your project any time you save it with a *.bak1 extension.

Subsequent saves will rename the backup file with a *.bak2 and finally *.bak3 extension, so there will always be three backup files saved with *.bak1 the most recent and *.bak3 the oldest.