If you do not have internet access to reach the Edge add on store, follow this process and use the file attached.
20.4+
No longer have e2e_apmon_dev that includes the nimrecorder. It is only available to load from the edge store
Download the attached zip folder to the server where you want to install Nimrecorder. Extract to the desktop.
Open Edge Browser.
Go to manage extension.
enable developer mode
Click on Load unpacked
Browse to the desktop->addon->7.1.115.0 folder and press select folder.
Close and open the browswer and nimrecorder should be installed and working.