There are several ways for checking the IntraWeb version installed in your IDE.
Context menu of IW controls displays IntraWeb license information, including version number.
Open the ServerController unit of your project, activate the Object Inspector and check the Version property.
If you are running a Stand Alone Server project, check the log window of the Stand Alone GUI. The text of the log window shows your license information as well the IW version your application was compiled with.