A major bug came with the last version (188.8.131.52). No settings or inventory (like tools, workpieces etc) will be saved when you exit the application. We are sorry about that and ask you to please update to the new version 184.108.40.206 as soon as possible.
We strongly recommend that you uninstall all previous version of the CNCSimulator Pro before installing a new version to avoid file conflicts and confusions. You can uninstall an older version from the Control Panel in Windows.