This wasn't a case where KeePass was compromised in any way, as far as I can tell. This appears to be a basic case of a threat actor distributing a trojanized version via malicious ads. If users made sure they are getting the correct version, they were never in danger. That's not to say that a supply chain attack couldn't affect KeePass, but this article doesn't say that it has.
Long term keepass users aren't going to be affected. If you mention software to others make sure you send them a link to a known safe download location instead of having them search for one (as new users searching like that are more at risk of stumbling on a malicious copy of the official site hosting a hacked version).
It's only a matter of time until _they_ are also popped :(.
> The beacon established command and control over HTTPS