Apparently error -2 means it's an invalid file. Are we all issued the same license file? If the one that was emailed to me is now good, is there another way to get one if I've already registered? Can one be zipped and posted here?
FINALLY! The license file name is CASE SENSITIVE! It MUST be "SELicense.dat" and not "selicense.dat". I reregistered, using a gmail account to make sure my email service wasn't corrupting things and found the file came through with capital letters instead of all being lowercase.