How to run XLSTAT the first time?
Whatever your Excel or XLSTAT version, it is necessary that the Macros security level is set to Medium so that XLSTAT can run. Here is how to proceed depending on your Excel version.
Excel 2007:
- Click the "Office Button" on the upper left corner of the Excel window to open the Office Menu.
- Click on the "Excel Options" button on the bottom of the Office menu window.
- The "Excel Options" window will appear.
- Select "Trust Center" in the middle of the menu bar on the left.
- Click on the "Trust Center Settings..." button on the right of the window.
- The "Trust Center" window will appear.
- Select "Macro Settings" in the middle of the menu bar on the left
- Select the third option for the "Macro Settings"
- Activate the Option "Trust access to the VBA project object model"
- Click OK to close the "Trust center" window
- Click OK to close the "Excel options" window
Excel 97 to Excel 2003: Use the menu Tools/Macros/Security of Excel

Updating Excel and installing XLSTAT
It is also recommended that you make sure that your Excel version is up to date. Microsoft publishes free patches on a regular basis that improve the reliability and stability of the software. To upgrade your Excel version, go to:
http://office.microsoft.com/officeupdate.
To install XLSTAT, you should use an account that has administrator rights on the machine. If there are several accounts on the machine, the administrator should install XLSTAT using the "Custom" option and run XLSTAT once from his account to enter the license key.
Running XLSTAT
To run XLSTAT for the first time, you can either choose the option to start XLSTAT after the installation procedure, use the Windows Start/Programs/Addinsoft/XLSTAT command, use the XLSTAT shortcut on your desktop, or launch Excel, then open the XLSTAT.xla file using the Excel open command.
XLSTAT will then prompt you for your license number (see below). If you do not have one yet (if, for instance, you've only downloaded the trial version of XLSTAT), please enter "Evaluation" and click "OK".

If you are using XLSTAT for the first time, XLSTAT will add a new button
in the Excel standard toolbar. The button can be used to open XLSTAT when you are using Excel, and can be removed if you wish. This button can also be used to close XLSTAT.
After completing this procedure, the XLSTAT toolbar and the XLSTAT menu will be added to Excel (see image below). Both the toolbar and the menu allow the user to access all XLSTAT functionalities.

The XLSTAT toolbar can be used to access sub-toolbars. By leaving the cursor on a button, you can see the corresponding function. By clicking on it, you activate the dialog box corresponding to the selected function.

Click here for other tutorials.