Mitsubishi · Recovery walkthrough

Bypass Mitsubishi GX Works3 Security Key

2:58 · Published Dec 2025

Platform: Mitsubishi

Open a Mitsubishi GX Works3 project when the original security key is missing. The security key is a distinct, project-level protection from the FB/POU block password: Mitsubishi's own manual (Project → Security → Security Key Management) describes it as registered per-PC, and a computer without that registered key simply can't open the project data — regardless of whether any individual block is also password-protected. Critically, Mitsubishi's documentation notes the registered key is not removed by uninstalling GX Works3, which is exactly why a failed or replaced PC leaves the project locked even to its rightful owner. If you'd rather have it handled, I provide manual Mitsubishi recovery support — done personally, with nothing sold or downloaded from this site.

What this walkthrough covers

GX Works3 project-level security key (not the FB/POU block password)
Opening a project when the registered PC is unavailable or the .key file is lost

Supported software & hardware

GX Works3 projects secured with Security Key Management
iQ-R / iQ-F / FX5U projects

Who this is for

Your .key file is lost or the PC that registered the security key failed
You've inherited a locked project from a previous engineer
You need access to a project you legally own and the registered PC no longer exists

Locked out of a Mitsubishi project you own?

Send the software and version, and a short description of what you're locked out of. The work is manual and done personally — no tools sold, no downloads.

Email for recovery support More on YouTube

⚠ For legitimate recovery, maintenance and authorized access only. By contacting me you confirm you own, or are authorized to service, the equipment in question.

Questions

Which products and versions does this cover?

It applies to GX Works3 projects secured with Security Key Management, iQ-R / iQ-F / FX5U projects.

Who does the recovery?

I do, personally. Every job is manual — it isn't automated with a tool and it isn't resold to anyone else.

Do I have to own the equipment?

Yes. I only help owners and authorized maintainers regain access to their own projects — in line with the authorized-use-only policy on the channel.

Do you sell a tool or a download for this?

No. There are no tools for sale and no downloads on this site. Recovery is a manual service I perform or guide you through.