> or on a more serious note-CAD software used to make a living

Yes. Updates should be provided. Paid updates, of course. And the updates don't need to work on older versions. The issue isn't providing the same version working forever for free. It's providing an upgrade path. Adobe doesn't just release new software for a money grab. Professionals rely on Adobe to keep up to date, and Adobe does this.

> It was a one time payment, and I'm not sure I should 'expect' anything after that.

I'd hope for any tool you invest time in you would expect continued support for the product.

But, if a company doesn't want to release updates for this, there is a solution (which happens to solve your game problem).

Open sourcing the code is always a solution, and if Sparrow did that, it would, in effect, silence all the people with an issue.

I hope that better explains my point of view. I'm not expecting anything free. I'm not expecting long term support for old software. What I am expecting is an upgrade path. New version coming out that keep up with the times. That's software I'd pay for (and I do).

Note: I didn't purchase Sparrow. I just understand the issues.