Depends on what the EULA for the product said and what happened to the company. Companies of any value tend not to just disappear; they get bought by other com

Depends on what the EULA for the product said and what happened to the company. Companies of any value tend not to just disappear; they get bought by other companies who thus inherit their IP rights. Sometimes after a while it can be hard to determine who owns a piece of IP. This can happen with old video games, for example, since the studios and publishers have split and merged so much over the years. At times it's a matter of interpretation who owns a property, and it can end up in court. TLDR there's almost always someone ready to take your money; not always easy determining who it should be.