There is a system variable in ProgeCAD called "DYNMODE". The default value for this is 3, which enables the user to see a dynamically popped window showing the list of filtered commnds on screen. If you wish to stop this display in ProgeCAD, type DYNMODE in command prompt and set the value to "2" instead of "3".
At any point of time, DYNMODE value can be changed back to 3 or vice versa.