Please consult the manual, there is a clear and detailed explanation.

If you want to bypass the 5000m radius restriction for your AATs, you have to manually edit the flight plan file (.FPL) with a simple text editor (wordpad, for example). Look for the "TPName" corresponding to the TP you want to modify then look for "TPRadius". Change the value by any other (in meters).

For example, if the TP you want to change is the #2 (TP #0 is the airport, TP #1 is the start line), look for "TPRadius2=". If you have "TPRadius2=3000" and want a 20,000 meters area, enter "TPRadius2=20000".

Save now the file and reload it in Condor, even if it seems to display it already.