I am trying to deactivate my Flash Builder 4.5 (on 2 machines) so that I can activate on 2 other machines. I called installation support and they directed me here.

Forum|Forum|1 month ago
August 5, 2026
8 replies
63 views

When I try to use the deactivation feature within Flash Builder, it say “Deactivation was not successful. Please try again.”

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nuno84

Participant

Hi,

I have a new PC and I am trying to insert the key, but it says it is already used in max 2 computers.

I assume one of them it was because I needed to replace the motherboard of this new PC and also did a windows reinstall, so I cannot decativate that “old” one.

Is there any solution? I have applications I still need to support.

Thanks

Nancy OShea

Community Expert

@nuno84,

Unfortunately, unless you can deactivate from at least 2 devices, you can’t continue using this license.

Which Adobe application was this for?

Nancy O'Shea— Product User & Community Expert

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nuno84

Participant

Hi Nancy,

First of all thank you so much for taking the time to help.

What if I have no way to deactivate? Because I used in old computers that I don’t have or were formatted and the motherboard changed.

Is there a way to request a reset to Adobe so they invalidate every active licence from their side? Because I don’t have a way to deactivate.

Thank you so much

Jon Fritz

Community Expert

I’m reasonably sure you’re simply out of luck here.

The final version of the program came out in 2012 at version 4.7. Main support ended in 2017 and all extended support ended in 2019.

Just in case you were still developing for it, Flash Player itself ended all support in 2020 and all Flash content has been blocked since 2021.

I’m pretty sure, like the vast majority of Adobe programs from before the Creative Cloud subscription service, the licensing servers have been deactivated and there is no way to deactivate or activate the program.

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AdamNetAdminAuthor

Participant

Thanks for the candid answer. We built so much on this technology. I was just trying to maintain it until we finish migrating off it.

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AdamNetAdminAuthor

Participant

Also, it may be that it is not an issue with deactivating but an issue with a 4.5 license key needing a 4.0 license key. I primary issue is that I can’t activate on my new machine.