From Allimagetool Software:
If you computer is compatible Office 2003, but you want to make use of the Office 2000/2007 Excel. Now, Xlsx Xlsm to Xls Converter 3000 can help you free batch convert xlsx, xlsm to xls with professional quality and fast speed. User-friendly interface allows you to use very easily without any learning curve. Merely need a few clicks. Add the converted files to the list and click "convert" conversion can be done automatically. Advanced features: Simultaneously convert massive different format files to Xls once. Convert Xlsx, Xlsm to Xls. Provide more detailed parameters settings to resize the output page. Support add the entire folder to convert. Key features: User-friendly interface, very easy to use, just a few clicks can finish the conversion. Be amazed at fast conversion speed and excellent file quality. If you do not have time to convert the files of list now, you can save the converted list to your computer. Do not need to load every file again. Have the option to auto open the output folder when conversion finished.