Windows / Lyx 1.5.2: Can't use the AltInstaller-Update.exe

[S. Teinturier]

Hi,
Just a problem while launching the
LyX-152-3-20-AltInstaller-Update.exe 
<ftp://ftp.lyx.org/pub/lyx/bin/1.5.2/LyX-152-3-20-AltInstaller-Update.exe>

Appears "This update package can only update Lyx 1.5.1!"

Whereas I DO have Lyx 1.5.1.
Lyx 1.5.1 is in this folder: ~\ProgramFiles\Lyx15

Any idea about that? Sorry, it seems I'm the only one with this problem...
Anyway, I can uninstall Lyx 1.5.1 and install the new Lyx 1.5.2...

Thanks.
Sara

Win XP SP2