[Zuider]

Can such an EULA even be remotely binding? Especially in the light of the fact that the OP notes that he had independently developed a very similar product, and there are a lot of ? What is so unique in this product that similar features in another application could be proven to be copying?

[tmikaeld]

It would depend on where the EULA was accepted and which country the developer is from. If it's the US, I bet the person with the deepest pockets would win in court (or settle). If it's in the EU, there are already a ton of patents about visually binding SQL - the biggest being Oracle.