NOTE: AFAIK, BGL2XML versions later than 1.10 fail to show the XML code source of BGLs compiled in FSX SDK BGLComp Compiler.
The current version of Bgl2Xml GUI is 1.5.1 dated 2 May 2011. Bgl2Xml command line is 1.3.1 dated 12 Jan 2011.
I have never received any reports that they do not work with FSX so if there is a bug I would certainly like to look into it......
Bgl2Xml (137) GUI can be downloaded from here: http://www.mediafire.com/?kv3x6uzsk2tk1yd
When run for the first time the auto updater (near bottom left of the display window) should search for, find and offer to install 1.5.1.