You can d/load LW Basic(free) version from here: http://www.limewire.com/english/content/download.shtml

If you had the Pro version and it's still within 6 months since you purchased it, enter your e-mail here: http://sales.limewire.com/support/pro_lookup.php, and it'll take you to your personal download page.

If it's past 6 months, you'll have to purchase it again. You should be able to get it at a reduced rate(USD$14.50) by going to your Personal d/load page.

Next time back it up onto a disc.

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If it ain't broke, fix it till it is!