Try flashing pcm as new, have it connected so it will download the required files.
But have a spare ecu because if there is a fault indeed in there might brick upon flashing
Hi so SDD 164 has been deadlocked by age (2 years) so will no longer work even after fresh install.
I created a page to run it in a Virtual Machine, url: https://dl.prolts.uk/sdd/ username landy password zone.
Documentation on how to run is there...