If you cannot download version 8.5 because your contract has expired, you will need to renew SnS (Support & Subscription) or use a newer version (8.6, 8.7, etc.) if your environment supports it.
Note: Broadcom (VMware’s owner since November 2023) has moved many downloads behind a Support Portal paywall. Free registration no longer grants access to vSphere Replication 8.5 without an active production license. vmware vsphere replication 8.5 download
If you already have vSphere Replication 8.4 deployed, do not simply download 8.5 and deploy a new appliance next to it. VMware supports in-place upgrades. If you cannot download version 8