The structure of geodatabases has evolved considerably since v 9.2 and 9.3; your first step would be to create a brand new file geodatabase in 10.6.1. Then, import your parcels feature class into the new geodatabase. Do the same thing with any and all other feature classes. After that, create your own new 10.6.1 mxd that has the data you need and start editing.
That should just about do it....