Hi John:
It is not impossible prior versions of MSFS 2020 and 2024 required different workflows for content as discussed in other posts in that thread page #13:
https://www.fsdeveloper.com/forum/threads/msfs-asobo-official-blender-exporter.454146/page-13
However, if one compares wording of the MSFS SDK Docs for 2020 (and a 2024 'Beta build' I cited above), they say this regarding the Blender Exporter:
2020:
https://docs.flightsimulator.com/ht...lugin/The_Blender_Plugin.htm?rhhlterm=blender
"This plugin is only compatible with
Blender 3.3.x LTS, 3.6.x LTS, 4.2.x LTS, and 4.5.x LTS.
Other versions are not supported."
2024:
https://docs.flightsimulator.com/ms...Plugins/Blender_Plugin/The_Blender_Plugin.htm
"These plugins are only compatible with
Blender 3.3.x LTS, 3.6.x LTS, 4.2.x LTS, and 4.5.x LTS.
Other versions are not supported."
* Notice when you scroll up vertically on the cited MSFS SDK Doc web pages that they specify the MSFS numeric version the Doc pertains to.
* Notice too, in the 2024 SDK Doc
URL immediately above, there is the term "
flighting", which is an oxymoron as AFAIK, FSDEVS never "Fly"

.
All joking aside, I have seen the term "
flighting" used in Asobo's MSFS web pages to distinguish between Release To Mfg. (RTM) and Beta information.
I should have known if MSFS 2020 and 2024 could both be regarded as a Work-In-Progress (W.I.P.), each may have a set of "
flighting" SDK Docs.
https://docs.flightsimulator.com/html/home.htm
https://docs.flightsimulator.com/msfs2024/flighting/html/1_Introduction/Introduction.htm
The latter info is distinctly labeled as for 2024.
But, witness this post in the "official" MSFS forums regarding a 2020 Beta using the term "
flighting":
https://forums.flightsimulator.com/...mulator-2020-sim-update-16-1-1-39-12-0/758903
"
While flighting update 16.1 over the past several weeks, we’ve monitored feedback on stability and have confidence that the core issues we intended to fix have been addressed. However, due to fewer Microsoft Flight Simulator (2020) flighting participants since the release of Microsoft Flight Simulator 2024, telemetry from flighting has become less reliable."
< Ahem... either that, or more people have begun turning off 'Telemetry' in Windows.

>
And as I suspected, when one queries the MSFS 2024 SDK "flighting" Docs, one finds this info on the (intended ?) Blender Exporter compatibility:
"These plugins are only compatible with Blender 3.3.x LTS, 3.6.x LTS, 4.2.x LTS, and 4.5.x LTS.
Other versions are not supported."
I suppose that if MSFS 2020 and 2024 can both be regarded as a Work-In-Progress (W.I.P.), each may have a prototype Blender Exporter version.
I have not yet found a specific MSFS 2020 beta download for the latest 'W.I.P.' of a "
flighting" prototype Blender Exporter version; but I'll bet it exists.
BTW: Here is Google's info on "
flighting" in the context of MSFS:
https://www.google.com/search?q=MSFS+"flighting"&sca_esv=ccdc78ba7fe3748d&source=hp&ei=jknSaaHyJInD0PEP-OvHyQI&iflsig=AFdpzrgAAAAAadJXntWPmhZVF-qA7VKiZllaQSOjOUnB&ved=0ahUKEwih8ZDXz9aTAxWJITQIHfj1MSkQ4dUDCCg&uact=5&oq=MSFS+"flighting"&gs_lp=Egdnd3Mtd2l6IhBNU0ZTICJmbGlnaHRpbmciMgYQABgWGB4yBhAAGBYYHjILEAAYgAQYigUYhgMyCxAAGIAEGIoFGIYDMgsQABiABBiKBRiGAzILEAAYgAQYigUYhgMyCxAAGIAEGIoFGIYDMgUQABjvBTIFEAAY7wUyCBAAGIAEGKIESPAdULQHWKAacAF4AJABAJgBgAGgAfwDqgEDNC4yuAEDyAEA-AEB-AECmAIHoAKPBagCCsICChAAGAMYjwEY6gLCAg4QABiABBiKBRixAxiDAcICCxAuGIAEGLEDGIMBwgIREC4YgAQYsQMYgwEYxwEY0QPCAggQABiABBixA8ICDhAuGIAEGIoFGLEDGIMBwgILEC4YgAQYxwEY0QPCAgUQLhiABMICCxAAGIAEGLEDGIMBwgIREC4YgwEYxwEYsQMY0QMYgATCAg4QLhiABBixAxjHARjRA8ICBRAAGIAEwgIIEC4YsQMYgATCAggQLhiABBixA5gDF_EFEGA8k2IZFrSSBwM1LjKgB6ozsgcDNC4yuAf4BMIHBTMtNC4zyAd9gAgB&sclient=gws-wiz
FYI: When I do a Google search for SDK Docs info on MSFS numeric versions, I do typically do include the specific year in my query;
For 2020:
https://www.google.com/search?q=site:+docs.flightsimulator.com+Blender&sca_esv=16ba40aa3fcb8328&source=hp&ei=1UvSaY3YBtnN0PEPzdubqQg&iflsig=AFdpzrgAAAAAadJZ5aiVtq6tWbbpEZyW4tPKcJU5BZxi&ved=0ahUKEwjNlvLs0daTAxXZJjQIHc3tJoUQ4dUDCCg&uact=5&oq=site:+docs.flightsimulator.com+Blender&gs_lp=Egdnd3Mtd2l6IiZzaXRlOiBkb2NzLmZsaWdodHNpbXVsYXRvci5jb20gQmxlbmRlcjIFECEYoAEyBRAhGKABMgUQIRigATIFECEYoAEyBRAhGKABSLKLBFCJClim_wNwAngAkAEAmAHWAaAB1g-qAQY0LjExLjG4AQPIAQD4AQH4AQKYAhKgApwTqAIKwgIKEAAYAxiPARjqAsICCxAAGIAEGIoFGJECwgIREC4YgAQYigUYkQIYxwEYrwHCAg4QLhiABBiKBRixAxiDAcICDhAuGIAEGLEDGMcBGNEDwgIFEC4YgATCAgsQLhjHARjRAxiABMICCxAuGIAEGMcBGNEDwgILEAAYgAQYsQMYgwHCAgoQABiABBiKBRhDwgIIEC4YsQMYgATCAggQABiABBixA8ICCxAuGIAEGLEDGIMBwgIREC4YgAQYsQMYgwEYxwEY0QPCAgUQABiABMICCxAuGK8BGMcBGIAEwgIHECEYChigAcICBRAhGKsCmAMf8QW5hOM1bOQP1pIHBjIuMTMuM6AHjW-yBwYwLjEzLjO4B-wSwgcJMi0zLjguNi4xyAepAoAIAQ&sclient=gws-wiz
Following this link:
https://docs.flightsimulator.com/html/Asset_Creation/Blender_Plugin/The_Blender_Plugin.htm
...I find this:
"This plugin is only compatible with
Blender 3.3.x LTS, 3.6.x LTS, 4.2.x LTS, and 4.5.x LTS.
Other versions are not supported."
For 2024:
https://www.google.com/search?q=site:+docs.flightsimulator.com/2024+Blender&sca_esv=16ba40aa3fcb8328&ei=aUzSaYVl-punzg_06ffACg&biw=1088&bih=504&ved=0ahUKEwjFvbWz0taTAxX6zckDHfT0HagQ4dUDCBM&oq=site:+docs.flightsimulator.com/2024+Blender&gs_lp=Egxnd3Mtd2l6LXNlcnAiK3NpdGU6IGRvY3MuZmxpZ2h0c2ltdWxhdG9yLmNvbS8yMDI0IEJsZW5kZXIyCBAhGKABGMMESMksULYLWIIbcAF4AZABAJgBlwGgAdcEqgEDMC41uAEMyAEA-AEBmAIGoALVBcICChAAGEcY1gQYsAOYAwCIBgGQBgiSBwMxLjWgB5oJsgcDMC41uAeyBcIHBzItMi4zLjHIBz6ACAE&sclient=gws-wiz-serp
Following this link:
https://docs.flightsimulator.com/ms...Plugins/Blender_Plugin/The_Blender_Plugin.htm
...I find this:
"These plugins are only compatible with
Blender 3.3.x LTS and 3.6.x LTS.
Other versions are not supported."
Thus, the "
RTM" ('
Retail') version of MSFS 20204- and SDK Docs- show Asobo does
not (yet) specify Exporter compatibility beyond
Blender 3.6.
As numerous threads here at FSDEV point out, that does not mean we have
no results using MSFS SDK 2024 Blender Exporter with
'Other versions'.
As ronh is part of the team that is / was developing multiple forks of the MSFS Blender Exporter, I assume his posts contain info worthy of consideration.
That also may infer ronh is a highly experienced programmer and Blender user, and thus I assume his posts contain info worthy of consideration.
Although ronh's info refers to capabilities (intended ?) within an existing "Beta" build of MSFS, I doubt that SDK Doc would exist if it did not already work.
So, yes, the specific MSFS version that is this thread's subject is 2020; I do hope
MSFS 2020 RTM Docs link is now in your Bookmarks / Favorites.
As for a MSFS "Manual", that is the SDK Docs, as
there is no MSFS 'Manual'; thus, at FSDEV for MSFS queries, we can no longer just say "
RTFM".
Is there some specific MSFS 2020 project goal you need / want to achieve, that seems possible / or preferable to do in... "
other" Blender versions ?
PS: The world time zone clock indicates it is still not too late to have a Happy Easter where you are.
GaryGB