It's no longer available. Tibco Jaspersoft delete all the previous versions of JasperReports server both from Community and Commercial sites.
Yes, you will have to use the jasperserver-cp-4.7.0-bin.zip file and then follow the instructions in the <unpacked>/docs/JasperServer-Install-Guide.pdf to do the installation. (I think I spelled the file names correctly).
We have posted versions of the releases needed for upgrading to our current releases, JasperReports Server Community Edition (v5.5, v5.6). These can be found either on this website at: http://community.jaspersoft.com/project/jasperreportsr-server/releases or directly on SourceFourge: https://sourceforge.net/projects/jasperserver/files/JasperServer/ and consist of JasperReports Server Community Edition v5.2, v4.2.1 and JasperServer Community Edition v3.7.0.