AS 1.0/1.1 alpha and MT 4.21 - botched upgrade, fixed via config.yaml, but still not working

Sorry - I wanted to get the subject line for this question right... I had a nasty time upgrading from MT 4.0 to 4.21 and ended up deleting all of my plugins and normal MT directories (i.e. extlib, tools, mt-static, lib, etc, etc) and copying the files for 4.21 back to the system. The mt-upgrade process finally went smoothly. I went back to try to install the plugins I originally was using - AS 1.0 being one of them. Well, AS 1.0 and 1.1 aren't working and without any error reporting that I can see, I can't figure out why. I followed Mark's recommendation at http://forums.movabletype.org/2008/08/does-actionstreams-10-work-wit.html where I incremented the schemaversion (was 9 and changed to 10) in config.yaml in plugins/ActionStreams and re-ran mt-upgrade.cgi. The output claimed changes were being made and things were being upgraded (I *wish* I had written down what the output was), but AS is still not working.
I then went further and modified the mtplugindata and mt_config tables and removed any mention of AS. When I went back to the mt.cgi to check user info, etc, the system prompted me to upgrade to support AS 1.1. This time, I would have written down information, but it simply reported that the upgrade went fine. I have disabled and re-enabled the plugin, deleted other profiles and re-added them, run 'run-periodic-tasks' by hand to no avail. There aren't any errors in the Activity log nor my system logs. So, at this point, I'm lost... Any ideas out there?