Update list for Duplicate Preventer

Duplicate Preventer 2.0.159 changelog from December 5, 2009

Duplicate Preventer 2.0.143 from October 13, 2009

Excel 2007 support improvement
Installation on PC with several Excel version improvements

Duplicate Preventer 2.0.2.2 changelog from June 13, 2009

License changed to freeware

Older Duplicate Preventer versions:

2.0.159 (Dec 5, 2009)2.0.143 (Oct 13, 2009) • 2.0.2.2 (Jun 13, 2009)

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