I do not recommend going forward with a system restore. I do recommend downloading the latest Version 6 Build 2 installer and running it. (NOTE: If you get the option to Repair. then select this option) This will insure the application runs properly after doing a Windows System Restore.
Unless you have a backup of your data there is no means of recovering the information at once. You will need to re-enter your markup values. The material and hardware can be added by loading a cabinet, assembly, or job that contains the data to help re-establish things. Sorry for the inconvenience.