Hi,
the first thing -of course- that comes to mind is that I would do this using the find command. One would use the mtime flag to set the (modification)time and would combine it with the name-checker (-name) to exclude blahblah.zip. Then pipe it into xargs rm -f and that's it.

But then you seem to want to do this in perl. Simply put a check into your loop:

foreach $file (<*.zip>) {
  next if $file =~ /blahblah/;
  # continue with filetype- and time-checking and 
  # deletion...
  unless (-d $file) { # no dirs
    # use stat($file)[9] which is mtime in seconds, I 
    # think, or use the -M filetest which gives days
    # to find out whether to delete or not...
  }
}
[download]

(Please note the regexp test (/blahblah/) could be replaced by string equality ( eq "blahblah.zip") when you really(!) need performance, and please lookup the return values of -M and stat since I'm not really sure of it).

Maybe you should consider using File::Find for this...

Regards...	Stefan
you begin bashing the string with a +42 regexp of confusion