Just throwing my name in as one that has experienced these issues as well.
D/l'd the patch, ran it. Launching give black screen. I trash both the original game file and new patch. Re-download both and try to open original "base" gae file and get the "not recognized" message. Not, not, not , not good.
Patience, I know. Patience. But man, this sucks. I was so wanting to check out the update.