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(1 edit)

When you try to open it for the first time, you should see a blue(/other colour) pop-up (if you're on Windows 10) in the middle of the screen that says that Microsoft Defender SmartScreen prevented the app from running and doing so anyway might put your PC at risk. This is just standard procedure for unknown publishers. Under that paragraph, it has a button that says "More info" and looks more like a link than a button. If you click it, a button called "Run anyway" should appear next to the "Don't run" button in the bottom-right corner of the pop-up.
Press it

but what's blue there are every blue apps and stuff in my pc

Are you seeing a pop-up that looks like this?

(I changed my Windows colour to red, but it's probably blue for you)

I dont have that in my pc