Does anyone know ho to reactivate TOPCAT now that server is out of order?

I got this message:

An unknown error occurred during Product activation: wrong server response. Please contact [email protected]

But flightsimsoft.com and topcatsim.com are "under costruction" or down.

I activated PFPX without issues but not TOPCAT.

Any help or ideas?

I believe TOPCAT is dead in the water.

If you are using Simbrief/Navigraph your t/o and landing performance is calculated through Navigraph for most ircraft in the sim. Is it completely accurate? Nope but it's good enough for flightsim needs.

Hi speedyTC, I know but I still regret not being able to use software that I paid for and that integrates perfectly with PFPX if I didn't want to use SimBrief.

So using the activation key is no help.

Server is definitly down, site closed. I have my code but can't access to server. I don't know why at this poit why the dev release it as free download, word not allowed Radar Contact.

Must be something resent. I got a new pc in January and TOPCAT loaded and i use it weekly.

Edited July 20, 20251 yr by JAT

I dont know if this will help.

https://forum.aerosoft.com/index.php?/topic/180489-flightsimsoft-site-down/

Thanks JAT but I already follow that topic, the strange thing is that I can activate perfectly PFPX but TOPCAT not and is the same developer fligthsimsoft.com

It's impossibile to contact devs or support. 

Hi Everybody,

I have Topcat and use it along side Simbrief. Anyone know where I can find the activation in the systems registry so it can be saved? Don't want to lose TC over an activation issue in the future.

Has anyone tried this freeware item: https://flightsim.to/file/24722/aircraft-runway-performance-spreadsheet
Thanks

Edited July 25, 20251 yr by Mike_CFII_MEL

Hi Mike, I'm in your same situation. At this point I don't know why the author revert in free license (like Radar Contact 4.3). TOPCAT is a great piece of software and I would use it along side PFPX that activates perfectly. Can't understand why TOPCAT no!

Are the TOPCAT activation details written into the registry? I was wondering if they can be manually added. I found a TOPCAT folder in there which has a USER folder that has some REG_SZ entries for Code, Email, First & Last name. I assume these would have the correct detail when activation is successful. I tried to enter my key number & details in there but it didn't work.

2 hours ago, Pilots Report said:

I tried to enter my key number & details in there but it didn't work

Does your Topcat key consist of ten or fifteen characters?

7 hours ago, srcooke said:

Does your Topcat key consist of ten or fifteen characters?

Fifteen

Unfortunately the fifteen character code requires an online server activation.

On 9/12/2026 at 10:18 AM, Pilots Report said:

Are the TOPCAT activation details written into the registry? I was wondering if they can be manually added. I found a TOPCAT folder in there which has a USER folder that has some REG_SZ entries for Code, Email, First & Last name. I assume these would have the correct detail when activation is successful. I tried to enter my key number & details in there but it didn't work.

Ian, what did you enter in the Email field? That should contain your Activation Key minus any hyphens.