Si je ne me trompe pas, il faut modifier le lien :
<eoledl dl="https://downloadarchive.documentfoundation.org/libreoffice/old/%version_tres_long%/win/x86/LibreOffice_%version_tres_long%_Win_x86.msi" destname="libreoffice\LibreOffice_%version_tres_long%_Win_x86.msi"/>