The information in the props.dbs file is organized in a very precise structure so that STAR-CCM+ can read it into the simulation. This structure consists of:
Only the material names and property data, which follow the Notes section, may be modified. These modifications must follow a precise syntax of position and spacing in order to be read by STAR-CCM+.
You should never modify the original props.dbs file supplied with STAR-CCM+. Make a copy of the file for modifications and keep the original somewhere safe.