(Copied this explanation to the initial post, too.)
Sorry, but I don’t see what Windows Update has to do with this. I am not talking about some end-user issue. I am not talking about some problem I would see with some specific aircraft, old or new. I am talking about a desired simplification of the aircraft add-on developer workflow.
I am talking about what is described in the Blur Meshes section in SDK Documentation ., and the Propeller Still / Slow / Blurred Mapping section in SDK Documentation .
That the developer of an add-on aircraft has to manually create the blurred versions of a propeller or wheel using Photoshop (or similar).
The SDK documentation says For the slow and blurred blades use planar unwrapping. The texture can be generated by screenshotting the still blades and radial blurring in Photoshop.
To me this sounds like a procedure that the software could do automatically the first time the version of an aircraft is loaded: Calculate what the blur of a rotating propeller should look like. That is what software is good at, replacing tedious repetitive fully scripted human work.