Need Help Deactivating Photoshop CS5 on a Broken Computer

Hello,

I am currently using the 20GB Adobe plan on two personal computers, and I also have a perpetual license for Photoshop CS5, which I use on a separate work computer (different device).

Recently, the desktop computer I used for work suddenly broke down. As a result, I wasn’t able to deactivate Photoshop CS5 on that machine before it became unusable. I installed Photoshop CS5 from the original CD on a new work computer, and it worked fine for a few days. However, now I’m getting a message saying that the license is already in use on two computers, and I can no longer use it.

Since I can’t access the original work computer to deactivate it, I’m looking for advice.
Is there any way to deactivate Photoshop CS5 from the previous (now unusable) computer?

Thank you in advance for your help!