Yes, upgrade from FileZilla Server 0.9.x as soon as you reasonably can — it’s old, unmaintained software with no security patches, which is a real risk for anything reachable from outside your network. In a standard environment, the upgrade itself is simple: install FileZilla Pro Enterprise Server while your existing 0.9.x installation is still in place. The installer detects the old configuration and converts it automatically — no manual export/import needed in the typical case. One thing doesn’t carry over: granular per-directory permissions like disabling directory listings for specific users, covered below.
Why staying on 0.9.x is a real risk
FileZilla Server 0.9.x predates the current 1.x line and is no longer maintained — it doesn’t receive security patches for vulnerabilities discovered since its release. For a server that’s often reachable from the internet, running unmaintained software is one of the more avoidable risks in a typical infrastructure setup. If you’re still on 0.9.x, upgrading is worth prioritizing rather than deferring indefinitely.
How the upgrade works in a standard environment
- Leave your existing FileZilla Server 0.9.x installation in place — don’t uninstall it first.
- Download and run the FileZilla Pro Enterprise Server installer as you normally would.
- The installer detects the existing 0.9.x configuration and converts it automatically during installation. In a standard setup, that’s it — your users, groups, and core settings carry over without a separate export/import step.
What doesn’t carry over: granular directory permissions
If your 0.9.x setup used fine-grained per-directory permission controls — for example, disabling the ability for specific users to list a directory’s contents — that level of control isn’t available in FileZilla Pro Enterprise Server. Broader user, group, and read/write/delete permissions convert normally, but this specific granularity does not. Plan to review your permission structure after upgrading and reconfigure anything that depended on it, rather than assuming a like-for-like conversion.
Ready to move off unmaintained server software? See FileZilla Pro Enterprise Server.