No no no no no. It seems you've been misled by what it says on the VDH web site. Not
your fault. The site is woefully out of date. You need to read this:
https://groups.google.com/g/video-downloadhelper-q-and-a/c/nDUV1m2GTp4
So you don't buy a VDH license on the Google store. You do buy it on the VDH web site.
That function is up to date. Just click the Premium button at the top of any page on the
VDH web site
www.downloadhelper.net. Just be sure you visit the page using the browser
for which you want to buy the license. The page automatically detects your browser &
generates a license key for that browser, meaning Firefox or Chrome or Edge, the only
browsers supported by VDH. That should automatically install the license for you.
Do come back & let us know how you get on with this. Do that via the Reply all button.
DO NOT USE the Reply to author button. Reply all posts your comments in this thread. By
the way, I do not work for VDH. I'm just another user, like you.