Starting from an ordinary Flight Plan, IFR, I activate "Direct to".
In order to make "Direct to" work properly, I need to use the "Clear" button before the "Load" button.
If I do not do this, I have to push "Direct to" two times before getting the expected result.
Nota: There is no mention of the use of "Clear" for this purpose in the user's manual .
So, to have it working:
Method n°1
"Direct to"
Choose airport
"Load"
Result: Flight plan erased
"Direct to"
"Load"
Result OK
Method n°2
"Direct to"
Choose airport
"Clear"
"Load"
Result OK