Download birt version 4.5, birt-runtime-4.5.0-20150609.zip
http://mirror.rise.ph/eclipse/birt/downloads/drops/R-R1-4_5_0-201506092134/birt-runtime-4.5.0-20150609.zip
1. Download the attachment and unzip it
2. Download birt 4.5 and copy the birt jar to the lib folder.
3. Add to pentaho as a plugin