You need to have Excel installed before you install DataSave.
Unzip DataSave zip file, open the folder and double click on INSTALL.xls file. Software license agreement will appear. Read the Software license agreement and close it when done. Click Yes in the prompt window to agree to the terms and conditions of Software license agreement and continue installing DataSave. The software will be installed at C drive and will create desktop shortcut.
Depends on your Excel software security settings you may need to allow to run the DataSave macros. You can delete DataSave zip file and unzip folder.