Well, I have assumed the first attempt to buy the beta did not go thru, so I did it again and got the expected email, serial number, access to beta forum, etc. Things were looking up...
However, it is not clear to me what I'm supposed to do with the serial number. I get no "serial-dialog box" and there are no prompts for it when I invoke the program and none of the options I have before it stops me with the above error code give me an opportunity to enter any serial number or validation code. Perhaps it asks later in the sequence (after I'm getting the error code?)
Interestingly, I do get a prompt for the serial number with the Multiplayer .exe and it seems to accept it OK.
Are all downloads identical or do I need to go back and download again -- perhaps my matching serial number is encoded in a unique download that I get only after buying the package?
In any case, still get the error indication shown in the first post. Have downloaded several times, have installed and run both 64bit and 32bit .exe's as administrator several times, have restored my system to a previous time (and previous dx) etc., etc. but still no joy. I'm encouraged that I'm seeing several others who are seeing the same error indication as I, but haven't yet seen any reliable fixes...
Will pursue this in the focused beta support fora but just wondering if there is something obvious here that I'm missing.
-- Joker