Warning: VMware vCenter Converter Standalone 5.5 is an older, unsupported product. Using unsupported software can expose you to security, compatibility, and reliability risks. Prefer current VMware tools (e.g., VMware vCenter Converter Standalone latest supported version, VMware vSphere Replication, or other migration tools) where possible.
It looks like you're looking to download VMware vCenter Converter Standalone 5.5. Here's some information and steps to help you: Vmware Vcenter Converter Standalone 5.5 Download --
Note: Access to legacy "bits" may be restricted depending on current Broadcom account permissions. Broadcom Community Key Features of vCenter Converter 5.5 VMware vCenter Converter Standalone 5
Virtual SAN: First version to support Virtual SAN as a destination. Download and Access Released for vSphere 5
V2V Conversions: Supported converting third-party VM formats like Hyper-V and Acronis True Image. Why People Still Search for 5.5
For those who must use it, this guide has provided a roadmap from download to successful migration. Always remember: in legacy systems, patience and thorough testing are your greatest assets.