Update for 4K video Downloader for Mac OS last version that scratched old macOS 10.12.6. I cannot find old version on site. I lost 4K Video Downloader....

I followed the offer to update my 4K video Downloader for the new version.
Stupidely I didn't check if the IOS version was mine, and I still had the old macOS 10.12.6.
When I installed the new version, this offered to scratch the old version, that I (stupidly again) accepted...
The new version is not working on my old Mac, and I cannot find the previous version to download .
Where could I find it?
Thanks