New - NetGear Orbi 20/40 Series Firmware Version 2.3.0.28

I have downloaded using several different browsers. After I select "unzip all", a page opens asking me to select the destination for the files, I accept the choice already there, then it just takes me back to the page where I chose to unzip the files. NOthing else come up telling me to doa nything furthere, nmothing looks different than when this page first opens when I download the upgrade. If I'm suppoised to do something from there, I don't have instructions telling me that. I wouldn't know what steps to take next. Nothing in the user manual for my device gives me further instructions. It just says download and unzip. What next? How would I know if it actually unzipped? When I right click on the file, it says it is corripted, no matter which browser I use to download it. Last used was IE11. I think that was the fourth one used.

I apologize for niot getting this, I just don't understand what steps to take after I select unzip and acept the destination for the files.