How do I choose my router it’s not letting me refresh

What router do you have? 

what actual issue are you having? You didn't give us much for details about the issue. 

There's a support site with access to manuals, firmware, install guides, etc.
Go to https://www.netgear.com/support/
Type in your model number and from there it'll take you to the above.
Its a great resource to start with.