But fancy overwriting and not appending to a fsx xml config file...
I found their explanation even more disturbing:
I was not aware that this file is used by other add-ons (scenery developers usually don't need it), hence why the problem occur.
The "scenery developers usually don't need it" doesn't make any sense: even if it's not common for scenery developers to add their own modules to the EXE.XML file (but THEY did it!!), it's not obviously a good reason to wipe it out and replace it anew, instead of using proper XML parsers to add their section in the correct way, like we did for ages, and of course the EXE.XML is used by MANY other 3rd party modules, like UT2, Saitek, GoFlight, Opus, EzDoc Camera, and many others, without even considering GSX and/or XPOI, that aren't sceneries, and all of them will be disabled by this faulty installer.