I took your advice and excluded both the 2019 game folder and the database to exclude scanning of 2019, no difference,as I still have the rotating circle in surveyor;-see below.
The problem is I have many new assets for the Alpine tunnel route that I've yet to upload to DLS as I may not use all of them, would have to transfer a LOT of stuff as cdps over to 2022 . Also 99% of the time this hasn't been an issue when defender has been used, why would it only occasionally have this problem, I'd expect it to be fairly constant , this problem appears and goes although the part few days its being a persistent issue.
Today I did another extended database repair, but even after that, I have noticed on startup of trainz 2019 , when I go into surveyor a white transparent circle is constantly rotating in the centre of the screen , in front of the " Select " window , this would indicate to me some aspect of the program is not functioning correctly, processes unfulfilled in some way ? .
This is not occurring in 2022, if it was the root cause then I'd expect it to occur in both versions, 2022 seems not to have saving issues .
This is before I actually open any routes, or use any content .This isn't present when I'm opening 2022 , which I'm just testing to see how a payware route will perform on high settings. Driving west to denver,even with the database install on an external drive which not fast, no issues with performance at high settings with draw distance 12.500 ft and session saved and opened very quickly.