We have some setting wrong.
In 2018, when we double clicked on a point it brought up a Carlson Point Edit box. Also in Hydrology double clicking on a pipe brought up the Hydrology program.
In 2019, double clicking a point brings up an AutoCAD attribute edit window. Double clicking on a pipe loads the Pedit command.
We have installed the latest updates to 2019 and it still hasn't fixed the problem.