I just tested AIR 29.0 vs AIR 30.0 captiva runtime on Windows XP.
AIR 29.0 works and AIR 30.0 (not compiled as 64 bits) gave me the following error message: "... is not a valid Win32 application".
I know that Windows XP is dated and there is no more support from Microsoft, however there is a lot of Windows XP machines out there.
It's not the end of the world because my updater mechanism was prepared for this.
I can provide a x86 version with AIR 29 as final (the very last one) and AIR 30 for x64.
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