where to download N5.5.5 from?

Hello.
i updated to N5.5.6(the last update) last week and it crashes all the time.
i can’t find previous updates, only the the initial 5.5 and the last update installers. tried on FTP and its not there either.
meanwhile i installed again N5.5 but it lacks the comping tool as we know it, so its really slows down my work.
Thanks.

anyone? Mods?
5.5.5 was solid with my system for long time!!

Try here:
ftp://ftp.steinberg.net/Download/



and here:
http://www.steinberg.net/index.php?id=downloads_nuendo_5&L=1