Yaaaaaaaay that worked, finally! Thanks for the code!
Good to know :) Everybody is happy now...
I don't understand though why this happened in the first place. Will I have to do this again in the future?
StCR 2.0 changed the way it stores the information about subscriptions, switching from its own table to a native WordPress table (
wp_postmeta, for those who like technical details). So this step was needed to 'import' the data from the former into the latter. In order to make the source code lightweight, the only place where to add this import was the 'activation' step, since WordPress doesn't have (or at least I'm not aware of...) a hook for things like this.
The new approach will make StCR compatible with WordPress Multiuser, and scalable on big networks of blogs, and it's strongly suggested by core WordPress developers.
Does all this make sense? :)