RXPGTN Software update

Hello,
The first time I got this message I clicked on "Download update" and it loaded the file "rxpGTN.FS.zip" in the Windows System32 folder.

Now each time my pc is launched for the first time, the window "A new version of RealityXP Garmin GTN (FltSim) is available!" is displayed. 
A message says that this update already exists so I close the window.
If I click on "Skip this version" the window also closes.

Why is this message recurring?

I found the "rxpGTN.FS.zip" folder in Wibdows - System32.
Should we unzip it where is?
Is there anything else to do?

Thanks for your help.