Unzip the downloaded prologinexcel_setup.zip folder.
Run the setup.exe file.
You probably get some security warning such as this one (According to Windows and Excel versions, security warning may have different aspect):
Click on Install.
You may have others security warning coming from anti-virus. Accept the installation.
When installation is finished, you probably get a message such as:
Click on Close.
Open a new Excel workbook.
In the left of the top menu, go to File:
On the left, click on Options.
You get this new window:
On the left, select Add-ins.
Then at the back select COM add-ins.
Then click on the Go... button.
You get this new window:
Thick the prologinexcel check-box.
Click the OK button.
On the left, select Customize Ribbon:
On the right, thick the PliX box.
Your Excel workbook has now an additional menu item Plix.
In a cell, type exactly (or copy/paste):?- true.
Double click on this cell:
You get a message box with “yes“.
It works!