sed -i .backup -e "s/^\(.*mac-snapshot.*\)\(OpenSCAD-.*\.dmg\)\(.*\)\(OpenSCAD-.*dmg\)\(.*$\)/\\1$file1\\3$file1\\5/"$indexfile
elif[$OS== LINXWIN ];then
file2=$2
sed -i .backup -e "s/^\(.*win-snapshot-zip.*\)\(OpenSCAD-.*\.zip\)\(.*\)\(OpenSCAD-.*zip\)\(.*$\)/\\1$file1\\3$file1\\5/"$indexfile
sed -i .backup -e "s/^\(.*win-snapshot-exe.*\)\(OpenSCAD-.*-Installer\.exe\)\(.*\)\(OpenSCAD-.*-Installer.exe\)\(.*$\)/\\1$file2\\3$file2\\5/"$indexfile