Making a new thread, since otherwise I'd be pretty much derailing the Mod Support one.
Here is a mockup I've made for a Thrive launcher; it would give the player a quick glance at recent news each time they start it up, as well as recent Dev Forum posts.
It would also allow the player to more easily download the newest updates, as well as letting them play older versions too - The arrow next to the 'Download/Play' button would give a dropdown list of older versions and such, which the player could choose to play.
There are some things that I neglected to include that would be rather useful: The ability to change settings before launching, important links to important sites like revolutionarygamesstudio.com, the community and dev forums, and our various social media accounts; and finally, perhaps some sort of simple way to load mods.
EDIT: Here is a version with the Developer Forum and News boxes switched around, plus with some other small changes.