You can download a specific, community-verified version of 3.11 using the command: choco download winbox --version=3.11 .
After connecting successfully, go to → Backup to File . Save winbox311_backup.ovf . This preserves your managed router list and saved credentials (encrypted).
If you cannot find 3.11 on the official site, the version has likely been retired. In that case, use the — it will still work with legacy routers.
When downloading legacy networking tools, your security is the top priority. Avoid third-party "warez" sites that may bundle malware with the executable.