In only few easy steps you can convert multiple XLSX files into MS Excel XLS format
In any Windows OS, Download & install the program after that you can install the application in your system from:
Start>>Programs>>Birdie XLSX to XLS Converter
Now you can select the XLSX files from your machine using any of the 2 available options:
1. Add (.xlsx) files: Just click here & go to the location where you have XLSX files stored. Then you can choose the files you want to convert using CTRL + Click method.
2. Add folder having files: Before you click this button you will need to save all XLSX files in 1 folder, after that you can select the folder for conversion add XSLX file in batch.
Now you have to click on "Convert Files", on doing so you will also have to select a location to save the converted XLS files.
It's better to have a folder created in advance to save the converted files.
You can check-out the status of conversion in progress.
Once it will complete you will get the message as shown in the image.
Go to your chosen saving location & open any converted XLS files.