Im not sure if this helps... You could probably hear me screaming last Saturday afternoon from my office in Cupertino, CA. The fact that it was beautiful outside didnt help. I searched the CD (The stuff that became available for Apollo over the weekend was a hand out at ApolloCamp on Friday night.) I read the release notes, so I had the file name, but I still couldnt find it on the CD. I finally found it in the Flex Builder directory
fb_apollo_extensions_win_alpha1rc3.exe The location of this file was a point of confusion for me, first because there was an Apollo directory at the same level. I had already installed Flex Builder and wasnt interested in the Flex Builder folder whatsoever. I searched the Apollo folder and others on the CD several times and couldnt find this file and the information wasnt on the website yet. I was pulling my hair out. If you havent yet already, be sure to install the runtime as well. If you havent yet this may be the problem. If you havent run the plugin installer you'll need to do that next. Go to Apollo... http://adobe.com/go/apollo this will redirect you to http://labs.adobe.com/technologies/apollo/ and at the bottom of that page you can find the runtime under "Run Apollo Applications"(INSTALL THAT FIRST) and the plugin "Develop Apollo Applications" (INSTALL THIS NEXT). Im not sure if the order is important, i did it that order and it works for me. Though I am having minor trouble with transparent apps? I think they tried to make it really easy. (And maybe fo someone who understands Eclipse, as well as those Adobe guys do, it probably was. Anyway the installer (fb_apollo_extensions_win_alpha1rc3.exe) makes it simple, good luck.
