Any news on this? Reading through the SDK it seems that interactions are now separarted into multiple files: the standard interactions.xml (same as 2020), which is located in the Asobo/generic folder, and multiple xmls in the Asobo_EX1 folders. That would also explain why some buttons don’t have the blue highlight when using the mod (they’re the ones using the old Interactions.xml), while others do (problably the ones using the new 2024 modelbehaviourdefs). @Flobud I don’t have the knowledge nor the experience to understand which lines should be changed but maybe there’s a chance of getting the mod working in 2024?
I pretty much just got to this point, re-inventing the wheel, following on from a discussion here.
I had got hold of an old copy of the mod, and was trying to reverse engineer that for 2024. I had done it correctly, but was testing it on a 2024 native 172, and I still had the blue highlights.
When I tried it on the 2020 version of the BBS islander, the addon worked. The cockpit switches had no blue highlights, though I noticed after I removed the addon that the yoke doesn’t glow blue anyway, only switches, and knobs.
Essentially I changed two lines in the following file, leaving a copy of the original line commented out above.
ModelBehaviorDefs\asobo\generic\interactions.xml
<Case NotEmpty="HIGHLIGHT_NODE_ID">
<!-- Skip the highlight for this MouseRect (can be used to prevent breaking material using a dynamic texture such as touch screens) -->
<!-- <HIGHLIGHT_NODE_ID>#HIGHLIGHT_NODE_ID#</HIGHLIGHT_NODE_ID> -->
<HIGHLIGHT_NODE_ID>__NO_HIGHLIGHT__</HIGHLIGHT_NODE_ID>
<!-- <HighlightNodeId>#HIGHLIGHT_NODE_ID#</HighlightNodeId> -->
<HighlightNodeId>__NO_HIGHLIGHT__</HighlightNodeId>
For 2024 native it looks like the cockpit interactions are split up into many files. Using the VFS tool, you can see there are quite a few:
However none of these have any mention of the word “higlight”.
This file looks promising however:
modelbehaviordefs\asobo_ex1\base\component\mouserect.xml
It has some “highlight” lines that I recognise from the other “2020” file. No luck with that file so far. I tried several native 2024 planes, and my changes did nothing. It’s possible there are other files though, and I haven’t identified them yet.
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This is what we are trying to figure out for the past 9 months.
In msfs2020 the highlight was defined in one line in Interactions.xml. Changing the same thing in FS2024 does not work anymore, at least not for default planes. I don’t fly them so it’s not a big issue for me. Fenix, PMDG, iFly and other good addons don’t have this annoying blue highlight.
When I “learn” a new aircraft, I actually don’t mind the “Lock” interface because it not only shows the function but also the current state of a switch/lever. But in my case, as soon as I move the mouse over a switch, even without pressing a button, the mouse switches the switch. Very annoying. Can this be avoided?
Super late answer, sorry about that. I did try to fix it on 2024 but to no avail. Now, hobanagerik seems to have find something interesting.
I would love to try fixing it again but I refunded 2024 so I don’t have it anymore. And I for sure won’t buy it again. 
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IIRC you need to use the VFS projector to expose that path/file.
I just found the Blue Highlights solution for MSFS2024 sim.
Sadly there is still no solution to disable highlights for all planes but if anyone is flying A2A Aerostar I managed to remove them from walkaround mode. Just insert these two lines into \Community\a2a-aircraft-aerostar600\SimObjects\Airplanes\aerostar600\common\model\Templates\A2A_Templates_BASE.xml
<HighlightDisabled>True</HighlightDisabled>
<MOUSERECT_HIGHLIGHT_DISABLED>True</MOUSERECT_HIGHLIGHT_DISABLED>
I put it below <INTERACTABLE_GROUP_ID/> entry in row 232.
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