again, I think you should check your attitude at the door.
You’ve got an old product. But it’s still “supported” in the community here, and that’s the level of support you’ll continue to get from us (and GHI who are continuing to do this social support even though the product formally is no longer supported).
Changing the link in the app would require a change to an established piece of code, and that in itself then requires support - so it would have been much better if you consider this a locked away app and you downloaded all components you need and locked them in a virtual safe for later use; but for now, we’ve given you the hints that you should need.
To help us further help, you should clearly articulate what you can see with your device (things like device manager, and what components we’ve talked about that you have installed.
I’m not sure who your “bad decisions” comment was directed to - GHI or yourself? If GHI, I’d say nope, they are a commercial business that have to draw lines in the sand at some stage. We all have come unstuck on the point of buying something only to find it became unsupported, before we considered our use of it “finished”, or just before a better model was released. If yourself, again I’d say nope, you bought something to do the job when you bought it, and time moves on; it’s still a capable platform, and still worth pursuing; but I would say if you are prototyping something for the future that may turn into a bigger thing, now may be the right time to consider the new TinyCLR OS SITcore products rather than put effort into proving a concept on the old stuff and having to re-do some of that in the new world.