How can I stop Edge from prompting me to allow an app to open?

Click Start button and click Control Panel.
In the Control Panel, go to User Accounts and then click Change User Account Control settings.
This will open up the User Account Control Settings window.

In the User Account Control Settings window, you'll see a slider with four options.
The default setting is the second-highest option -
the top setting is Always notify
(you'll get notifications whenever an app tries to make changes to your computer,
or if you make changes to Windows settings),
while the bottom setting is Never notify (you will never get notifications, ever).

I suggest choosing one of the middle two settings -
either the default setting or the second-lowest setting,
which will notify you just as much as the default setting but will not dim your screen to do so.
Choose the setting you want and press OK.

No matter what choice you make,
you will see a UAC pop-up window asking if you want to allow this app
Its a security feature to click to allow changes -
You really need to be notified that a program/app is about to make changes to your computer.