Can't reinstall Mulberry

In spite of all my foresight in asking for help ahead of time and
saving the necessary files, I have not been successful in reinstalling
Mulberry on my new desktop computer (which, like my previous computer,
runs WinXP Pro).  I saved the preferences.mbp file--in fact, I even
wound up saving the entire Mulberry folder inside Program Files--but
when I reinstalled Mulberry and moved the old preferences.mbp file
over, it seems not to recognize it.  It recognizes that the program is
registered to me, but then it asks me for all the information that my
preferences files is supposed to provide.  I tried two different
versions of the preferences file (one saved just by copying, the other
by the "save as" method).  Neither seems to work.  I tried moving over
the entire saved Mulberry folder.  That didn't work either. 

I'd be VERY grateful for any help in getting this sorted out.

Thanks in advance.

Joan