Sorry, (not a perl programmer) perhaps you can provide some hints on how to get this to work.  I tried it on my machine and this is what I got:

C:\JIM\Perl>bbunwrap.pl < matra11.txt > matra11.html

[Wed Apr 21 15:16:25 2010] bbunwrap.pl: Name "main::allow_html" used only once:

possible typo at C:\JIM\Perl\bbunwrap.pl line 15.

[Wed Apr 21 15:16:25 2010] bbunwrap.pl: Name "main::FORM" used only once: possib

le typo at C:\JIM\Perl\bbunwrap.pl line 18.

[Wed Apr 21 15:16:25 2010] bbunwrap.pl: Use of uninitialized value in read at C:

\JIM\Perl\bbunwrap.pl line 5.

[Wed Apr 21 15:16:25 2010] bbunwrap.pl: Use of uninitialized value $thebook in s

tring eq at C:\JIM\Perl\bbunwrap.pl line 24.