Installer for Raidar for (old) ReadyNas DUO

I have an old ReadyNas Duo and I have Raidar (version 4.1.7) installed on my old laptop.

Now I want to install Raidar on my new laptop. I tried to install version 6.3.0 but it said it could not find a netgear storage in my network. I assume this version of Raidar is not compatible with my NAS. So now I want to install a version 4.1.x but I cannot find an installer for it on the Netgear site. All I find are zip-files with updates. Can anyone tell me where I can find the proper installer?

Thanks!