Use the letters "j" and "k" to reduce the LNA and the IF. Shift-J and Shift K increases these values.
If you drop back to SDRplay API Service v3.06, FMPP 1.13 will work without the start-up error.
If you drop back to SDRplay API Service v3.06, FMPP 1.13 will work without the start-up error.