I can share my experience, which is:
– Yep, the fading logo stays for me too. I figure: “what do you expect for free, anyhow: it’s not that hard to live with until you’re ready to pay”
– I get a crash in the designer too, I reported it in a thread just before yours. Thankfully, the whole QML system is good enough that I haven’t really felt the need for the designer anyhow
– I have successfully re-applied for the license for the same feature name – so that seems to work.
– I haven’t tried plugins yet.