Hi,
I have your tool. In tool I used auto synchronization. Today (18.10.2022, 3:46 pm) your tool calculated 3452 spins. I checked some positions in tool and in game and it seems they are the same, so tool works
I also downloaded 'big bang' planets-SI2-U1.xml.gz file from your site (SI_Tool). And problem is with date in this file.
As I understand file shows planet start position index of it's orbit at start day of '03.02.2013 10:53'. So if planets change it's positions once a day then number of days between today and that start date should be equal to spins in your tool. But 3544 days have passed between that day '03.02.2013 10:53' and today '18.10.2022 3:46 pm', not 3452 as tool shows.
If I would like to have that 3452 spins then the start date would be '06.05.2013' (between that date and today there is 3452 days).
So the question is if that file is wrong with date?