Lost license key for v4.0.11

I bought an older plasma table Mach3with /sheetcam v4.0.11. It has been working fine, but I just found out, the hard way, that after I had tried to update and switch computers my license reverted to a demo license on the original computer. Since sheetcam was sold a few years ago I was told the old license key is no longer available. I’m dead in the water. Is anyone out there using an old machine who is willing to share an old license key with me? I have tried to find it in the computer but to no avail.

@Shawn , you likely downloaded sheetcam v8.x from the sheetcam.com website. V8.x requires a new license. However, from that same website, you can still download one of the last v7.x versions which will work with your v4.x license key.
Use this link to download v7.x- https://www.sheetcam.com/Downloads/akp3fldwqh/SheetCam%20TNG%20Development%20setup%20V7.1.35.exe

To find the v4.x license key, search your computer for the file name “license.camlic”.

Thanks for the input. But the exact problem is that I lost that license key while trying to update.