I run the upgrade and it helped. Strange because I run it on the occasion of upgrading from 2.4.4 to 188.8.131.52 with this plugin already enabled.
Anyway, there are no metrics found. I signed in to http://pkp-alm.lib.sfu.ca
and I see that there are no articles in the "Articles" section. In the "Sources" I see that many of them have either "inactive" or "waiting" or "disabled" status. I posted few weeks ago my IP and journal urls as stated in the original post, and what's next? Should I activate something or wait the sources become active?