The pitch adjust should save between power cycles. The easiest way to verify backup power is to boot the EFIS by pressing and holding button 1 (left most bottom button) for about 5 seconds. If the screen boots without the master on then its drawing power from the backup power.

I've sent you an email with the latest version of V16. Try installing that and see if it fixes the saving issue. If not reply to the email with system logs using SET -> LOGS -> SYSTEM and attaching the *.ALS from the USB drive.