If you require version 5.5 specifically for a legacy project, you should avoid "patched" downloads and instead use official channels:
Given the challenges and risks associated with downloading patched software, here are some alternative approaches: code composer studio 55 download patched
In the early days of CCS v5.5, users often looked for "patches" or cracks to bypass the 90-day evaluation limit or to unlock features that were previously restricted by node-locked or floating licenses. However, as TI transitioned toward an open-source, Eclipse-based platform (and later Theia-based), they removed these barriers. If you require version 5