Hey @Colored_Greens,
thanks for responding and coming back with a possible new solution!
Unfortunately doesnt this work either. I can now download the launcher update, but the launcher itself still throws an error message at me ("Connection Error - Retry?" (Screenshot above somewhere)).
I appreciate your help tho.
I will just sit back and wait for a new update to be released. I wrote a support ticket yesterday, maybe someone is able to help me there, or us, as it seems to effect several people.