Everytime I try and launch the asset from their webiste I just I get this error

I have no idea what any of that means - so then I downloaded it manually. Bought the license for the correct version I am using. When I try to install it I get another error.

'Couldn't add library to …. to scanned asset library directories
No license file found for asset.'

Then I tried a free asset(equalizer) downloaded it, put it in the asset_store folder and it worked fine but when I try and run the paid one it's having none of it. I tried the trial of it too and even that won't install.

Any help is much appreciated

Cheers - Aten.