After executing the installer, you need to activate your ReqEdit license. Please start the "LicenseActivator.exe" to start the activation process.
Some distributions of ReqEdit activates automatically (e.g Trial version) and ReqEdit starts directly without the necessity of any interaction. Otherwise you got a window to enter the license key or the address of the license server, if you have one.
After klick the "Select" button, ReqEdit will start automatically, if the activation was sussesful.
To check you license please see the "License information" article.