Question:

I never manually installed SU1, I just shows 1.3.23 installed - is that correct.

Anyway, I had 30 airports in community folder.  The sim crashed when I attempted to start a flight at these airports.  Previous versions had no issues.  So I moved al my custom airports out of Community Folder.   Many still reside in my Library from DRZ, LATINVFR, FEELThere, FSDT and all have a notice on them say under the enabled section MS2020 and also say Not Creator Approved.  What does that mean?   Do I disable them.   am getting CTD all the time in the US where my airports are, but not in say Europe where I have no addon airports.

What is causing these CTD???

3 hours ago, paulyg123 said:

Question:

I never manually installed SU1, I just shows 1.3.23 installed - is that correct.

Anyway, I had 30 airports in community folder.  The sim crashed when I attempted to start a flight at these airports.  Previous versions had no issues.  So I moved al my custom airports out of Community Folder.   Many still reside in my Library from DRZ, LATINVFR, FEELThere, FSDT and all have a notice on them say under the enabled section MS2020 and also say Not Creator Approved.  What does that mean?   Do I disable them.   am getting CTD all the time in the US where my airports are, but not in say Europe where I have no addon airports.

What is causing these CTD???

1.3.23 is correct - your not going to want to hear this but move all of those airports from your community folder manually - makes sure the sim is ok then put one at a time back in to see which one is causing the issue

say under the enabled section MS2020 and also say Not Creator Approved ?       /  not sure what that is aren't you talking about msfs 2024 

You have 2024 and 2020 loaded on your pc ?

I have found personally that the best practice when it comes to Sim updates and scenery updates is to clear the scenery index and cache before running the sim. Add a pc restart for good measure and I've avoided having problems like those.