Hello Joydip
see recording: https://communities.ca.com/videos/5896-demo-how-to-download-product-and-solutions-from-ca-support
and below KB that is specific for APM that explain you how to download APM software in new support.ca.com portal
https://support.ca.com/us/knowledge-base-articles.TEC1829834.html
but to summarize:
1- select downloa and enter "CA Application Performance Management Agent MULTI-PLATFORM"
2-select your product realese from the drop down list boxes on the top right hand side
3- for example for 10.5.2, you would need to download this package
INTROSCOPE AGENT INSTALLERS R10.5.2.0 GEN06091313E.tar
4- extract it, the oracle PP is bundled within the Powerpack installer:
IntroscopeStandaloneAgentPPInstaller10.5.2.15windows.zip
or
IntroscopeStandaloneAgentPPInstaller10.5.2.15unix.tar
Please note that if you are using OracleDB 12c, you would need to update the oracle PP startup script to use ojdbc7.jar and JVM 1.8 - see attached word document I created for a customer to illustrate how to install the PP using a custom password & OracleDB12c.
https://communities.ca.com/docs/DOC-231176680-how-to-install-and-configure-oracle12c12101db-powerpack-for-oracledocx
I hope this helps,
Sergio