Installed the now-free Porter about a month ago in v5.3.  Installed using the license key number posted on the Milviz download page.  All was well.  Today, when selecting the AC I get a pop-up basically saying the license key is invalid (and P3D hangs).  Tried a reinstall witch both the posted key and no key at all, both times the installer said the key was invalid.  Anyone else seeing this?

Update: 36 hours later, the license key is accepted. Validation glitch on the server maybe.