While over-the-top installations sometimes work, a clean uninstall of previous G80 versions is recommended for beta builds.
If you rely on your machine for mission-critical work, you may want to wait for the stable "Gold" release. However, if you want the cutting edge of performance, v2.17 is the version to get. Final Verdict g80 utility client beta v2.17 download
If provided, verify the MD5 or SHA-256 checksum to ensure the file hasn't been tampered with. While over-the-top installations sometimes work