Install into FSX-Steam?

[scott967]

So I installed the universal installer into Win10 so i could install GSX Pro MSFS and thought while I'm at it, install some of my FSX airports into FSX-Steam on the same PC.  Universal installer has entries for these, but when select/click eg Honolulu I get a popup that universal installer can't install and instead use classic install.  It links into fsdt product page, but the only link I can find there is for the same universal installer.

Is there a direct link to the needed installer for FSX-Steam airports?

scott s.
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[virtuali]

The FSX or P3D product pages have download links for all products, and there's a download link for each one on every single product page too.